Follow the GDScript style guide in every script

- Types on every parameter, return value and variable, and snake_case names
  (the player name limit is the constant MAX_NAME_LENGTH).
- Spelling fixes: *_triggered, character_selected, separator, caught_errors.
  The server's catched_errors key stays as the server sends it.
- Signals are connected with signal.connect() instead of by name.
- Code is ordered signals, constants, exported vars, vars, @onready vars,
  functions, with @onready on one line and two blank lines between functions.
- Every script starts with a ## description. Template comments, old LOC notes
  and commented-out code are gone, apart from the local play code.
- Lines are at most 100 characters, apart from the local play path.
- The screenshot tour turns off the blinking text cursor so pictures match.

SyncPopup.tscn

@@ -145,13 +145,13 @@ text = "SoundtracksRemoved"
 unique_name_in_owner = true
 layout_mode = 2
 
-[node name="CatchedErrorsVBox" type="VBoxContainer" parent="SyncPanel/ScrollContainer/SyncVBoxContainer" unique_id=63733711]
+[node name="CaughtErrorsVBox" type="VBoxContainer" parent="SyncPanel/ScrollContainer/SyncVBoxContainer" unique_id=63733711]
 unique_name_in_owner = true
 visible = false
 layout_mode = 2
 size_flags_horizontal = 3
 
-[node name="CatchedErrorsLabel" type="Label" parent="SyncPanel/ScrollContainer/SyncVBoxContainer/CatchedErrorsVBox" unique_id=1784389644]
+[node name="CaughtErrorsLabel" type="Label" parent="SyncPanel/ScrollContainer/SyncVBoxContainer/CaughtErrorsVBox" unique_id=1784389644]
 layout_mode = 2
 text = "CatchedErrors"
 horizontal_alignment = 1

about_popup.gd

@@ -1,18 +1,8 @@
 class_name AboutPopup
 extends BasePopup
+## Shows the game version and what is new in each version.
 
-@onready
-var about_panel: Panel = %AboutPanel
-
-@onready
-var version_label: Label = %VersionLabel
-
-@onready
-var whats_new_label: Label = %WhatsNewLabel
-
-
-
-# Changelog as Dictionary with version as key and description as value
+## What is new in each version, newest first.
 const WHATS_NEW: Dictionary = {
 	"1.9.0": "Made improvements to the Search window
 	Made small changes to the inspiration list scrolling
@@ -51,15 +41,19 @@ const WHATS_NEW: Dictionary = {
 	"0.7-Beta": "Can now hop between songs"
 }
 
+@onready var about_panel: Panel = %AboutPanel
+@onready var version_label: Label = %VersionLabel
+@onready var whats_new_label: Label = %WhatsNewLabel
+
 
 func open() -> void:
 	super()
 	version_label.text = Settings.version
-	
+
 	# Build changelog text with version headers
 	var changelog_text: String = ""
 	for version: String in WHATS_NEW.keys():
 		changelog_text += "\n" + version + "\n"
 		changelog_text += WHATS_NEW[version] + "\n"
-	
+
 	whats_new_label.text = changelog_text

base_popup.gd

@@ -6,6 +6,7 @@ extends Control
 ## override [method open] or [method close] and call [code]super()[/code].
 
 ## The visible part of the popup. Clicks outside it close the popup.
+
 @export var panel: Control
 
 

character_card.gd

@@ -1,21 +1,30 @@
 class_name CharacterCard
 extends Control
+## One character in the character select popup: its picture and name. Clicking it picks
+## the character.
 
-@onready
-var panel: Panel = $Panel
-
-@onready
-var character_image: TextureRect = %CharacterTextureRect
-
-@onready
-var character_name_label: Label = %CharacterName
+## Emitted with the character's picture when the card is clicked.
 
 signal new_character_selected(img_texture: ImageTexture)
 
+@onready var panel: Panel = $Panel
+@onready var character_image: TextureRect = %CharacterTextureRect
+@onready var character_name_label: Label = %CharacterName
+
+
+func _input(event: InputEvent) -> void:
+	if visible && Settings.character_select_open:
+		if event is InputEventMouseButton && event.is_pressed() \
+				&& event.get_button_index() == MOUSE_BUTTON_LEFT:
+			var local_event: InputEvent = make_input_local(event)
+			if Rect2(Vector2(0, 0), panel.size).has_point(local_event.position):
+				GameLog.debug(character_name_label.text)
+				new_character_selected.emit(character_image.texture)
+
+
+## Shows [param character_name] and fetches its picture from the server.
 func set_character_name(character_name: String) -> void:
 	panel.size = Vector2(240, 145)
-	#margin.size = Vector2(240, 145)
-	#margin set margin 15, 10, 15, 0
 	character_name_label.text = character_name.split(".")[0]
 	character_name_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	var image_fetched: Callable = func image_fetched(image: PackedByteArray) -> void:
@@ -37,11 +46,3 @@ func set_character_name(character_name: String) -> void:
 		character_image.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
 		character_image.texture = new_image
 	MusicServerClient.fetch_character_image(character_name, image_fetched)
-
-func _input(event: InputEvent) -> void:
-	if self.visible == true && Settings.character_select_open == true:
-		if event is InputEventMouseButton && event.is_pressed() && event.get_button_index() == MOUSE_BUTTON_LEFT:
-			var evLocal: InputEvent = make_input_local(event)
-			if Rect2(Vector2(0, 0), panel.size).has_point(evLocal.position):
-				GameLog.debug(character_name_label.text)
-				new_character_selected.emit(character_image.texture)

character_select_popup.gd

@@ -1,35 +1,31 @@
 class_name CharacterSelectPopup
 extends BasePopup
 
-@onready
-var character_panel: Panel = %CharacterPanel
-
-@onready
-var title_label: Label = %TitleLabel
-
-@onready
-var character_grid: GridContainer = %CharacterGridContainer
-
-@onready
-var close_timer: Timer = %CloseTimer
+## Emitted with the picture of the character that was picked.
+signal character_selected(texture: ImageTexture)
 
 var can_select_character: bool = false
-
-signal new_new_character_selected(file_name: String)
-
 var character: PackedScene = preload("res://CharacterCard.tscn")
 
+@onready var character_panel: Panel = %CharacterPanel
+@onready var title_label: Label = %TitleLabel
+@onready var character_grid: GridContainer = %CharacterGridContainer
+@onready var close_timer: Timer = %CloseTimer
+
+
 func _ready() -> void:
 	close_timer.timeout.connect(_on_close_timeout)
 
+
 func _on_close_timeout() -> void:
 	GameLog.debug("_on_close_timeout!")
 	Settings.character_select_open = false
 	close_timer.stop()
 
+
 func load_characters() -> void:
 	GameLog.debug("load_characters")
-	var fetch_character_list: Callable = func fetch_character_list(list) -> void:
+	var fetch_character_list: Callable = func fetch_character_list(list: Variant) -> void:
 		GameLog.debug("fetch_character_list")
 		Settings.delete_children(character_grid)
 		if typeof(list) == TYPE_ARRAY:
@@ -40,9 +36,10 @@ func load_characters() -> void:
 				character_box.custom_minimum_size = Vector2(235, 145)
 				character_box.size = Vector2(235, 145)
 				character_box.set_character_name(character_name)
-				character_box.connect("new_character_selected", _on_character_selected)
+				character_box.new_character_selected.connect(_on_character_selected)
 	MusicServerClient.fetch_character_list(fetch_character_list)
 
+
 func show_grid(player_name: String) -> void:
 	GameLog.debug("show_grid")
 	title_label.text = "Select character for " + player_name
@@ -51,16 +48,18 @@ func show_grid(player_name: String) -> void:
 	can_select_character = true
 	Settings.character_select_open = true
 
+
 func close() -> void:
 	super()
 	Settings.character_select_open = false
 
+
 func _on_character_selected(texture: ImageTexture) -> void:
 	GameLog.debug("_on_character_selected")
 	# Not close(): character_select_open stays true until close_timer fires, so the click
 	# that picked the character does not also select a song behind it
-	self.visible = false
+	visible = false
 	if can_select_character:
-		new_new_character_selected.emit(texture)
+		character_selected.emit(texture)
 		close_timer.start()
 		can_select_character = false

http_transport.gd

@@ -6,8 +6,8 @@ extends RefCounted
 
 ## Seconds before a request is given up and reported as failed. This covers the whole
 ## download, so it is generous enough for long songs on a slow connection.
-var timeout_seconds: float = 120.0
 
+var timeout_seconds: float = 120.0
 var _owner: Node
 
 

inspiration_list.gd

@@ -4,35 +4,36 @@ extends ScrollContainer
 ## by itself, at the speed set in the settings.
 
 ## The soundtracks shown, in order.
+
 var soundtracks: Array = []
 
 # Scroll direction: 1 = down, -1 = up
 var scroll_direction: int = 1
 
-@onready
-var _rows: VBoxContainer = $VBoxContainer
+@onready var _rows: VBoxContainer = $VBoxContainer
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	scroll_direction = 1
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
+
 func _process(delta: float) -> void:
 	var speed_pixels_per_second: float = float(Settings.inspiration_list_speed) * 60.0
 	var scroll_amount: float = speed_pixels_per_second * delta * float(scroll_direction)
 
-	var scroll_bar = get_v_scroll_bar()
+	var scroll_bar: VScrollBar = get_v_scroll_bar()
 
 	# Don't scroll if list is empty or too short
 	if scroll_bar.max_value <= 0:
 		return
 
-	var current_pos = scroll_bar.value
+	var current_pos: float = scroll_bar.value
 
 	if scroll_direction == 1:
 		# Scrolling down
 		if current_pos + scroll_bar.page < scroll_bar.max_value:
-			scroll_bar.value = min(current_pos + scroll_amount, scroll_bar.max_value - scroll_bar.page)
+			scroll_bar.value = minf(current_pos + scroll_amount,
+					scroll_bar.max_value - scroll_bar.page)
 		else:
 			# Reached bottom, reverse direction
 			scroll_direction = -1
@@ -40,7 +41,7 @@ func _process(delta: float) -> void:
 	else:
 		# Scrolling up
 		if current_pos > 0:
-			scroll_bar.value = max(current_pos + scroll_amount, 0)
+			scroll_bar.value = maxf(current_pos + scroll_amount, 0)
 		else:
 			# Reached top, reverse direction
 			scroll_direction = 1
@@ -50,7 +51,7 @@ func _process(delta: float) -> void:
 ## Fetches every soundtrack from the server and shows them.
 func load_from_server() -> void:
 	GameLog.debug("load_from_server")
-	var populate_list: Callable = func populate_list(array) -> void:
+	var populate_list: Callable = func populate_list(array: Variant) -> void:
 		if typeof(array) == TYPE_ARRAY:
 			show_soundtracks(array)
 		else:

list_row.gd

@@ -16,6 +16,8 @@ var label: Label
 
 ## The item's text.
 var text: String:
+
+
 	get:
 		return label.text
 

log_popup.gd

@@ -1,19 +1,20 @@
 class_name LogPopup
 extends BasePopup
-
-@onready
-var log_panel: Panel = %LogPanel
-
-@onready
-var log_box: VBoxContainer = %LogVBoxContainer
+## The game log: a row with the time for each thing that happens in the quiz, such as a
+## player getting a point. Opened with Alt+L.
 
 var log_rows: Array
 
+@onready var log_panel: Panel = %LogPanel
+@onready var log_box: VBoxContainer = %LogVBoxContainer
+
+
 func add_log_row(text: String) -> void:
 	var log_row: String = get_time() + text
 	log_rows.append(log_row)
 	log_box.add_child(make_log_label(log_row))
 
+
 func make_log_label(row: String) -> Label:
 	var log_label: Label = Label.new()
 	log_label.add_theme_font_size_override("font_size", 20)
@@ -21,6 +22,7 @@ func make_log_label(row: String) -> Label:
 	log_label.autowrap_mode = TextServer.AUTOWRAP_WORD
 	return log_label
 
+
 func get_time() -> String:
 	var time: Dictionary = Time.get_time_dict_from_system()
 	return "%02d:%02d:%02d " % [time.hour, time.minute, time.second]

main_window.gd

@@ -5,39 +5,20 @@ extends Control
 ## Everything that is not part of a quiz lives here, so other views can be added next
 ## to the quiz later.
 
-@onready
-var top_bar: TopBar = $TopBar
-
-@onready
-var quiz: Quiz = $Quiz
-
-@onready
-var search_popup: SearchPopup = $SearchPopup
-
-@onready
-var sync_popup: SyncPopup = %SyncPopup
-
-@onready
-var shortcuts_popup: ShortcutsPopup = %ShortcutsPopup
-
-@onready
-var qr_popup: QRPopup = %QRPopup
-
-@onready
-var about_popup: AboutPopup = %AboutPopup
-
-@onready
-var log_popup: LogPopup = %LogPopup
-
-@onready
-var statistic_popup: PopupPanel = $StatisticsPopupPanel
-
-@onready
-var statistic_label: Label = %StatisticsLabel
-
 ## Dims the window behind an open popup and keeps clicks from reaching the buttons under it.
 var popup_backdrop: PopupBackdrop
 
+@onready var top_bar: TopBar = $TopBar
+@onready var quiz: Quiz = $Quiz
+@onready var search_popup: SearchPopup = $SearchPopup
+@onready var sync_popup: SyncPopup = %SyncPopup
+@onready var shortcuts_popup: ShortcutsPopup = %ShortcutsPopup
+@onready var qr_popup: QRPopup = %QRPopup
+@onready var about_popup: AboutPopup = %AboutPopup
+@onready var log_popup: LogPopup = %LogPopup
+@onready var statistic_popup: PopupPanel = $StatisticsPopupPanel
+@onready var statistic_label: Label = %StatisticsLabel
+
 
 func _ready() -> void:
 	popup_backdrop = PopupBackdrop.add_to(self, _popups())
@@ -50,8 +31,8 @@ func _ready() -> void:
 	top_bar.about_pressed.connect(show_about)
 	top_bar.qr_pressed.connect(show_qr)
 
-	sync_popup.connect("sync_started", _on_sync_started)
-	sync_popup.connect("sync_finished", _on_sync_finished)
+	sync_popup.sync_started.connect(_on_sync_started)
+	sync_popup.sync_finished.connect(_on_sync_finished)
 	quiz.server_changed.connect(search_popup.get_list_of_soundtracks)
 	quiz.event_logged.connect(log_popup.add_log_row)
 
@@ -63,9 +44,9 @@ func _input(event: InputEvent) -> void:
 		if event.alt_pressed && event.keycode == KEY_ENTER:
 			GameLog.debug("Alt + Enter pressed")
 			Settings.fullscreen = !Settings.fullscreen
-			if Settings.fullscreen == true:
+			if Settings.fullscreen:
 				DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)
-			if Settings.fullscreen == false:
+			if !Settings.fullscreen:
 				DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
 		if event.alt_pressed && event.keycode == KEY_K:
 			shortcuts_popup.toggle()

music_list_panel.gd

@@ -3,12 +3,12 @@ extends PanelContainer
 ## The list of songs in the playlist, one row per song.
 
 ## Emitted when the row of song number [param song_no] is clicked.
+
 signal song_clicked(song_no: int)
 
 var _song_list_object: PackedScene = preload("res://SongRow.tscn")
 
-@onready
-var _rows: VBoxContainer = %MusicList
+@onready var _rows: VBoxContainer = %MusicList
 
 
 ## Shows the songs in the playlist again, so it shows their latest state.

music_player.gd

@@ -3,76 +3,59 @@ extends Control
 ## The bar that plays the songs, with play, restart, progress and volume, and the
 ## auto repeat switch under it.
 
-# LOC 20/1-24: 136
-# LOC 12/6-24: 170
-
-@onready
-var play_button: TextureButton = %PlayTextureButton
-
-@onready
-var restart_button: TextureButton = %RestartTextureButton
-
-@onready
-var audio_player: AudioStreamPlayer = $AudioStreamPlayer
-
-@onready
-var sound_player: AudioStreamPlayer = $AudioSoundPlayer
-
-@onready
-var sound_effect_player: AudioStreamPlayer = $AudioSoundEffectPlayer
-
-@onready
-var progress_slider: HSlider = %MusicPlayerSlider
-
-@onready
-var volume_slider: VolumeSlider = %VolumeSlider
-
-@onready
-var music_time_label: Label = %MusicTimeLabel
-
-@onready
-var auto_repeat_button: CheckButton = $RepeatSongCheckButton
+signal update_song_list
+signal play_next_song
 
 var play_icon: Texture = preload("res://icons/play_icon_light.svg")
 var pause_icon: Texture = preload("res://icons/pause_icon_light.svg")
-
 var songs: Array = []
-
 var is_changing: bool = false
 var playback_position: float
 var stream: AudioStream
 var song_finished: bool = false
 
-signal update_song_list
-signal play_next_song
+@onready var play_button: TextureButton = %PlayTextureButton
+@onready var restart_button: TextureButton = %RestartTextureButton
+@onready var audio_player: AudioStreamPlayer = $AudioStreamPlayer
+@onready var sound_player: AudioStreamPlayer = $AudioSoundPlayer
+@onready var sound_effect_player: AudioStreamPlayer = $AudioSoundEffectPlayer
+@onready var progress_slider: HSlider = %MusicPlayerSlider
+@onready var volume_slider: VolumeSlider = %VolumeSlider
+@onready var music_time_label: Label = %MusicTimeLabel
+@onready var auto_repeat_button: CheckButton = $RepeatSongCheckButton
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	play_button.pressed.connect(play_or_pause)
 	restart_button.pressed.connect(restart)
 	progress_slider.drag_started.connect(_on_drag_started)
 	progress_slider.drag_ended.connect(_on_drag_ended)
-	
+
 	audio_player.finished.connect(_on_finished)
 	auto_repeat_button.pressed.connect(_on_auto_repeat_pressed)
 
+
 func _on_auto_repeat_pressed() -> void:
 	Settings.auto_repeat_song = !Settings.auto_repeat_song
 
+
 func _process(_delta: float) -> void:
 	if audio_player.has_stream_playback() && !is_changing && !audio_player.stream_paused:
-		if (!Settings.hide_beginning || audio_player.get_playback_position() > Settings.hide_for_seconds):
+		if !Settings.hide_beginning \
+				|| audio_player.get_playback_position() > Settings.hide_for_seconds:
 			progress_slider.value = audio_player.get_playback_position()
 		if stream != null:
 			music_time_label.text = format_text(progress_slider.value, stream.get_length())
 		else:
 			music_time_label.text = format_text(progress_slider.value, 0.0)
 
+
 func format_time(time: float) -> String:
 	var total_seconds: int = roundi(time)
 	@warning_ignore("integer_division")
 	return "%02d:%02d" % [total_seconds / 60, total_seconds % 60]
 
+
 func format_text(part: float, total: float) -> String:
 	if (Settings.hide_beginning && part < Settings.hide_for_seconds) && Settings.hide_length:
 		return "??:?? / ??:??"
@@ -83,6 +66,7 @@ func format_text(part: float, total: float) -> String:
 	else:
 		return format_time(part) + " / " + format_time(total)
 
+
 func play_or_pause() -> void:
 	if song_finished:
 		restart()
@@ -100,11 +84,13 @@ func play_or_pause() -> void:
 	else:
 		pause()
 
+
 func pause() -> void:
 	audio_player.stream_paused = true
 	playback_position = audio_player.get_playback_position()
 	play_button.texture_normal = play_icon
 
+
 func restart() -> void:
 	audio_player.stop()
 	audio_player.stream_paused = false
@@ -114,7 +100,8 @@ func restart() -> void:
 	audio_player.seek(playback_position)
 	play_button.texture_normal = pause_icon
 	audio_player.play()
-	
+
+
 func _on_finished() -> void:
 	play_button.texture_normal = play_icon
 	song_finished = true
@@ -122,26 +109,31 @@ func _on_finished() -> void:
 		play_next_song.emit()
 	if Settings.auto_repeat_song:
 		restart()
-	
+
+
 func _on_drag_started() -> void:
 	is_changing = true
 
+
 func _on_drag_ended(_changed: bool) -> void:
 	audio_player.seek(progress_slider.value)
 	playback_position = progress_slider.value
 	is_changing = false
 
+
 func seek(new_position: float) -> void:
 	progress_slider.value += new_position
 	is_changing = true
 	audio_player.seek(progress_slider.value)
 	playback_position = progress_slider.value
 	is_changing = false
-	
+
+
 func change_volume(value: float) -> void:
 	volume_slider.value += value
 	volume_slider.change_volume(volume_slider.value)
 
+
 func _on_point_triggered(point: String) -> void:
 	if point == "first":
 		var value: int = randi_range(0, 10)
@@ -153,11 +145,13 @@ func _on_point_triggered(point: String) -> void:
 			play_sound(preload("res://sounds/intro_short.mp3"))
 	elif point == "match":
 		play_sound(preload("res://sounds/sound0.mp3"))
-	
+
+
 func play_sound_effect(sound_effect_name: AudioStream) -> void:
 	sound_effect_player.stream = sound_effect_name
 	sound_effect_player.play()
 
+
 func play_sound(sound_name: AudioStream) -> void:
 	sound_player.stream = sound_name
 	audio_player.stop()
@@ -165,9 +159,8 @@ func play_sound(sound_name: AudioStream) -> void:
 	song_finished = true
 	play_button.texture_normal = play_icon
 	progress_slider.value = 0
-	#if stream != null:
-	#	music_time_label.text = format_text(progress_slider.value, stream.get_length())
-	
+
+
 func play_song(song: AudioStream) -> void:
 	audio_player.stream = song
 	audio_player.play()
@@ -183,6 +176,7 @@ func play_song(song: AudioStream) -> void:
 		progress_slider.tick_count = round(stream.get_length() / 60)
 	music_time_label.text = format_text(progress_slider.value, stream.get_length())
 
+
 func play_song_object(song_object_no: int) -> void:
 	GameLog.debug("play_song_object")
 	if audio_player.is_playing():
@@ -210,6 +204,7 @@ func play_song_object(song_object_no: int) -> void:
 	Playlist.song_is_playing(song_object_no)
 	update_song_list.emit()
 
+
 func get_sound_test_song() -> void:
 	var test_sound: Callable = func test_sound(body: PackedByteArray) -> void:
 		var sound: AudioStream = AudioStreamMP3.new()
@@ -220,12 +215,14 @@ func get_sound_test_song() -> void:
 #####    LOCAL
 var local_path: String = '/Users/sebastian/ResilioSync/Sorterat_test/Metal Gear Solid 4 - Guns of the Patriots/2-16 Metal Gear Saga.mp3'
 
+
 func load_mp3(_path: String) -> AudioStream:
 	var file: FileAccess = FileAccess.open(_path, FileAccess.READ)
 	var sound: AudioStream = AudioStreamMP3.new()
 	sound.data = file.get_buffer(file.get_length())
 	return sound
 
+
 func play_local_song() -> void:
 	if songs:
 		local_path = songs[0]
@@ -233,5 +230,6 @@ func play_local_song() -> void:
 		GameLog.debug(FileAccess.file_exists(local_path))
 		play_sound(load_mp3(local_path))
 
+
 func sound_test_local() -> void:
 	play_sound(preload("res://sounds/01. Opening.mp3"))

music_server_client.gd

@@ -7,6 +7,7 @@ extends Node
 ## without a running server.
 
 ## Sends the actual HTTP requests. Swap it out in tests.
+
 var transport: HttpTransport
 
 

player_name_field.gd

@@ -1,19 +1,28 @@
 class_name PlayerNameField
 extends TextEdit
+## The field for a new player's name. It keeps to one line of at most
+## [constant MAX_NAME_LENGTH] characters, and reports Enter so the player can be added.
+
+## Emitted when Enter is pressed while the field has focus.
 
 signal enter_key_pressed
+
+## Emitted when Alt+A is pressed.
 signal close_pressed
 
-@export
-var LIMIT: int = 10
-var current_text = ''
-var cursor_line = 0
-var cursor_column = 0
+## The longest name a player can have.
+const MAX_NAME_LENGTH: int = 10
 
-func _ready():
+var current_text: String = ""
+var cursor_line: int = 0
+var cursor_column: int = 0
+
+
+func _ready() -> void:
 	text_changed.connect(_on_text_changed)
 
-func _input(event):
+
+func _input(event: InputEvent) -> void:
 	if event is InputEventKey and event.pressed:
 		if event.alt_pressed && event.keycode == KEY_A:
 			close_pressed.emit()
@@ -21,15 +30,16 @@ func _input(event):
 			if event.keycode == KEY_ENTER || event.keycode == KEY_KP_ENTER:
 				enter_key_pressed.emit()
 
-func _on_text_changed():
+
+func _on_text_changed() -> void:
 	if text.contains("\n"):
 		text = text.replace("\n", "")
-	
-	var new_text : String = text
-	if new_text.length() > LIMIT:
+
+	var new_text: String = text
+	if new_text.length() > MAX_NAME_LENGTH:
 		text = current_text
 		# when replacing the text, the cursor will get moved to the beginning of the
-		# text, so move it back to where it was 
+		# text, so move it back to where it was
 		set_caret_line(cursor_line)
 		set_caret_column(cursor_column)
 

player_object.gd

@@ -1,40 +1,42 @@
-extends RefCounted
 class_name PlayerObject
+extends RefCounted
+## A player in the quiz: name, score and character. The players are kept in
+## [code]Settings.player_array[/code].
 
-signal first_point_triggerd
-signal match_point_triggerd
-signal winner_triggerd
+signal first_point_triggered
+signal match_point_triggered
+signal winner_triggered
 signal point_given_sound
 signal player_point_given
 signal player_point_taken
 
-## Unique id that never changes, unlike the player's position in Settings.player_array.
-var id: String = _generate_uuid()
-
-@export
-var player_name: String
-
-@export
-var player_score: int
-
-var is_first_point: bool = true
-
 ## Picture shown until the player picks a character.
 const NO_CHARACTER_PATH: String = "res://noCharacter.png"
 
+@export var player_name: String
+@export var player_score: int
+
+## Unique id that never changes, unlike the player's position in Settings.player_array.
+var id: String = _generate_uuid()
+
+var is_first_point: bool = true
 var character: Texture = load(NO_CHARACTER_PATH)
 
+
 func _init(new_name: String) -> void:
 	player_name = new_name
 	player_score = 0
 
+
 ## Returns a random version 4 UUID, e.g. "3f2b8c1e-9a4d-4e7f-b2c6-5d8e1f0a7b93".
 static func _generate_uuid() -> String:
 	var bytes: PackedByteArray = Crypto.new().generate_random_bytes(16)
 	bytes[6] = (bytes[6] & 0x0f) | 0x40
 	bytes[8] = (bytes[8] & 0x3f) | 0x80
 	var hex: String = bytes.hex_encode()
-	return "%s-%s-%s-%s-%s" % [hex.substr(0, 8), hex.substr(8, 4), hex.substr(12, 4), hex.substr(16, 4), hex.substr(20, 12)]
+	return "%s-%s-%s-%s-%s" % [hex.substr(0, 8), hex.substr(8, 4), hex.substr(12, 4),
+			hex.substr(16, 4), hex.substr(20, 12)]
+
 
 func add_point() -> void:
 	if player_score < Settings.winning_score:
@@ -46,14 +48,15 @@ func add_point() -> void:
 		# With a low winning score the first point can also be match point or the win,
 		# so the more important event is checked first
 		if player_score == Settings.winning_score:
-			winner_triggerd.emit()
+			winner_triggered.emit()
 		elif player_score == Settings.winning_score - 1:
-			match_point_triggerd.emit()
+			match_point_triggered.emit()
 		elif first_point:
-			first_point_triggerd.emit()
+			first_point_triggered.emit()
 		else:
 			point_given_sound.emit()
 
+
 func minus_point() -> void:
 	if player_score > 0:
 		player_score -= 1
@@ -61,6 +64,7 @@ func minus_point() -> void:
 		if player_score == 0:
 			is_first_point = true
 
+
 func reset_points() -> void:
 	player_score = 0
 	is_first_point = true

player_row.gd

@@ -1,21 +1,6 @@
 class_name PlayerRow
 extends Control
 
-@onready
-var player_name_field: Label = %Name
-
-@onready
-var add_button: Button = %AddPoint
-
-@onready
-var minus_button: Button = %RemovePoint
-
-@onready
-var character: TextureButton = %Character
-
-@onready
-var remove_player: TextureButton = %RemovePlayer
-
 signal change_character_clicked
 signal player_removed
 
@@ -26,7 +11,13 @@ var player_object: PlayerObject
 ## gives this player a point and Ctrl+Alt+<list_index + 1> takes one away.
 var list_index: int
 
-# Called when the node enters the scene tree for the first time.
+@onready var player_name_field: Label = %Name
+@onready var add_button: Button = %AddPoint
+@onready var minus_button: Button = %RemovePoint
+@onready var character: TextureButton = %Character
+@onready var remove_player: TextureButton = %RemovePlayer
+
+
 func _ready() -> void:
 	add_button.pressed.connect(add_point)
 	add_button.set_shortcut(create_button_shortcut(list_index, false))
@@ -37,42 +28,51 @@ func _ready() -> void:
 	update_score()
 	set_player_character()
 
+
 func _process(delta: float) -> void:
 	remove_player.visible = Settings.edit_players
 
+
 func create_button_shortcut(index: int, ctrl_pressed: bool) -> Shortcut:
 	var button_shortcut: Shortcut = Shortcut.new()
-	var button_event : InputEventKey = InputEventKey.new()
+	var button_event: InputEventKey = InputEventKey.new()
 	button_event.keycode = KEY_1 + index
 	button_event.alt_pressed = true
 	button_event.ctrl_pressed = ctrl_pressed
 	button_shortcut.events.append(button_event)
 	return button_shortcut
 
+
 func add_point() -> void:
 	player_object.add_point()
 	update_score()
 
+
 func minus_point() -> void:
 	player_object.minus_point()
 	update_score()
- 
+
+
 func change_character() -> void:
 	change_character_clicked.emit()
 
+
 func new_character_selected(character_texture: ImageTexture) -> void:
 	GameLog.debug("Back in player list with new")
 	player_object.character = character_texture
 	set_player_character()
 
+
 func set_player_character() -> void:
 	character.custom_minimum_size = Vector2(80, 40)
 	character.ignore_texture_size = true
 	character.stretch_mode = TextureButton.STRETCH_KEEP_ASPECT_CENTERED
 	character.texture_normal = player_object.character
 
+
 func update_score() -> void:
 	if OS.has_feature("debug"):
-		player_name_field.text = str(list_index + 1) + " " + player_object.player_name + ": " + str(player_object.player_score)
+		player_name_field.text = "%d %s: %d" % [list_index + 1, player_object.player_name,
+				player_object.player_score]
 	else:
 		player_name_field.text = player_object.player_name + ": " + str(player_object.player_score)

players_panel.gd

@@ -7,6 +7,7 @@ extends PanelContainer
 
 ## Emitted when a player has been added to [code]Settings.player_array[/code], before
 ## the list shows it.
+
 signal player_added(player_object: PlayerObject)
 
 ## Emitted when a player has been removed from [code]Settings.player_array[/code].
@@ -17,26 +18,17 @@ signal change_character_requested(row: PlayerRow, player_name: String)
 
 var _player_row: PackedScene = preload("res://PlayerRow.tscn")
 
-@onready
-var add_players_button: TextureButton = %AddPlayersButton
-
-@onready
-var add_player_container: HBoxContainer = %AddPlayerContainer
-
-@onready
-var add_player_button: Button = %AddPlayerButton
-
-@onready
-var new_player_name_field: TextEdit = %PlayerNameField
-
-@onready
-var players_list_container: VBoxContainer = %PlayersListVBoxContainer
+@onready var add_players_button: TextureButton = %AddPlayersButton
+@onready var add_player_container: HBoxContainer = %AddPlayerContainer
+@onready var add_player_button: Button = %AddPlayerButton
+@onready var new_player_name_field: PlayerNameField = %PlayerNameField
+@onready var players_list_container: VBoxContainer = %PlayersListVBoxContainer
 
 
 func _ready() -> void:
 	add_players_button.pressed.connect(add_players)
 	add_player_button.pressed.connect(add_player)
-	new_player_name_field.connect("enter_key_pressed", add_player)
+	new_player_name_field.enter_key_pressed.connect(add_player)
 
 
 ## Shows or hides the row for adding players, and the buttons for removing them.
@@ -51,7 +43,8 @@ func add_players() -> void:
 ## already as many players as there can be.
 func add_player() -> void:
 	GameLog.debug("add_player")
-	if new_player_name_field.text != "" && Settings.player_array.size() < Settings.MAX_NUMBER_OF_PLAYERS:
+	if new_player_name_field.text != "" \
+			&& Settings.player_array.size() < Settings.MAX_NUMBER_OF_PLAYERS:
 		var new_player_object: PlayerObject = PlayerObject.new(new_player_name_field.text)
 		new_player_name_field.text = ""
 		Settings.player_array.append(new_player_object)
@@ -72,8 +65,9 @@ func reload() -> void:
 		new_player.player_object = player_object
 		new_player.list_index = counter
 
-		new_player.connect("change_character_clicked", _on_change_character_clicked.bind(new_player, player_object.player_name))
-		new_player.connect("player_removed", _on_player_removed.bind(player_object))
+		new_player.change_character_clicked.connect(
+				_on_change_character_clicked.bind(new_player, player_object.player_name))
+		new_player.player_removed.connect(_on_player_removed.bind(player_object))
 
 		players_list_container.add_child(new_player)
 		counter += 1

playlist.gd

@@ -1,26 +1,32 @@
 extends Node
+## The songs of the current quiz, in the order they were added, and which of them are
+## played, answered and playing.
+##
+## Registered as the [code]Playlist[/code] autoload.
 
 var song_object_array: Array[SongObject] = []
 var latest_played_song: int = 0
 var currently_playing_song: int = -1
-
 var first_song_downloaded: bool = false
 var first_song_played: bool = false
-
 var number_of_tracks_to_preload: int = 1
 var is_song_downloading: bool = false
 
+
 func get_next_song() -> SongObject:
 	return song_object_array[latest_played_song]
 
+
 func set_latest_played_song() -> void:
 	latest_played_song += 1
 	if latest_played_song > song_object_array.size() - 1:
 		latest_played_song = song_object_array.size() - 1
 
+
 func update_last_played_song() -> void:
 	latest_played_song = song_object_array.size()
 
+
 func get_preloaded_songs() -> int:
 	var number_of_tracks_preloaded: int = 0
 	for song: SongObject in song_object_array:
@@ -28,9 +34,11 @@ func get_preloaded_songs() -> int:
 			number_of_tracks_preloaded += 1
 	return number_of_tracks_preloaded
 
+
 func should_preload_more_songs() -> bool:
 	return number_of_tracks_to_preload > get_preloaded_songs()
 
+
 func song_is_answered(song_no: int = currently_playing_song) -> void:
 	# Nothing is playing yet (-1); a negative index would answer the last, unplayed song
 	if song_no < 0 || song_no >= song_object_array.size():
@@ -41,9 +49,11 @@ func song_is_answered(song_no: int = currently_playing_song) -> void:
 		GameLog.debug("add to stats: ", song_no)
 		MusicServerClient.mark_song_played(song_no)
 
+
 func add_to_playlist(new_song_object: SongObject) -> void:
 	song_object_array.append(new_song_object)
 
+
 func get_playlist() -> Array[SongObject]:
 	if Settings.is_debug:
 		return song_object_array
@@ -54,46 +64,59 @@ func get_playlist() -> Array[SongObject]:
 				temp_list.append(s)
 		return temp_list
 
+
 func reset_playlist() -> void:
 	currently_playing_song = -1
 	latest_played_song = 0
 	clear_song_list()
-	
+
+
 func clear_song_list() -> void:
 	song_object_array.clear()
 
+
 func unset_is_playing() -> void:
 	for song_object: SongObject in song_object_array:
 		song_object.is_playing = false
 
+
 func set_currently_playing_song(value: int) -> void:
 	currently_playing_song = value
 
+
 func get_current_soundtrack_title() -> String:
 	return song_object_array[currently_playing_song].get_soundtrack_title()
 
+
 func get_current_song_title() -> String:
 	return song_object_array[currently_playing_song].get_song_title()
 
+
 func add_point(player_id: String) -> void:
 	song_object_array[currently_playing_song].add_point(player_id)
 
+
 func remove_point(player_id: String) -> void:
 	song_object_array[currently_playing_song].remove_point(player_id)
 
+
 ## Removes a player's points from every song.
 func remove_player_from_list(player_id: String) -> void:
 	for song_object: SongObject in song_object_array:
 		song_object.remove_point(player_id)
 
+
 func get_song(song_no: int) -> AudioStream:
 	return song_object_array[song_no].song
 
+
 func add_song_to_song_object(song_no: int, sound: AudioStream) -> void:
 	song_object_array[song_no].song = sound
 
+
 func song_has_played(song_no: int = latest_played_song) -> void:
 	song_object_array[song_no].has_played = true
 
+
 func song_is_playing(song_no: int = latest_played_song) -> void:
 	song_object_array[song_no].is_playing = true

qr_popup.gd

@@ -1,27 +1,25 @@
 class_name QRPopup
 extends BasePopup
+## Shows a QR code with the address of the search page on the MusicServer, so players
+## can search for soundtracks on their phones.
 
-@onready
-var qr_panel: Panel = $QRPanel
-
-@onready
-var qr_code_rect: QRCodeRect = %QRCodeRect
-
-@onready
-var url_label: Label = %URLLabel
+@onready var qr_panel: Panel = $QRPanel
+@onready var qr_code_rect: QRCodeRect = %QRCodeRect
+@onready var url_label: Label = %URLLabel
 
 
 func _ready() -> void:
 	qr_code_rect.light_module_color = Color.WHITE
 	qr_code_rect.dark_module_color = Color.BLACK
 	qr_code_rect.quiet_zone_size = 4
-	
+
 	# Generate QR code for the search URL
 	var url: String = Settings.default_path + "/search"
 	qr_code_rect.data = url
 	url_label.text = qr_code_rect.data
 	GameLog.debug("QR code generated for: ", url)
 
+
 func open() -> void:
 	super()
 	# Regenerate QR code in case settings changed

quiz.gd

@@ -9,54 +9,13 @@ extends Control
 
 ## Emitted when another MusicServer is picked in the settings, after the quiz has
 ## reloaded from it.
+
 signal server_changed
 
 ## Emitted with a line for the game log, e.g. when a player gets a point.
 signal event_logged(text: String)
 
-@onready
-var open_button: Button = $Open
-
-@onready
-var file_dialog: FileDialog = $FileDialog
-
-@onready
-var inspiration_list: InspirationList = $InspirationList
-
-@onready
-var now_playing: NowPlaying = $NowPlaying
-
-@onready
-var players_panel: PlayersPanel = $PlayersPanel
-
-@onready
-var toolbar: QuizToolbar = $QuizToolbar
-
-@onready
-var settings_popup: SettingsPopup = $SettingsPopup
-
-@onready
-var winner_popup: WinnerPopup = %WinnerPopup
-
-@onready
-var song_controls: SongControls = $SongControls
-
-@onready
-var song_loader: SongLoader = $SongLoader
-
-@onready
-var music_list_panel: MusicListPanel = $MusicListPanel
-
-@onready
-var character_select_popup: CharacterSelectPopup = %CharacterSelectPopup
-
-@onready
-var music_player: MusicPlayer = $MusicPlayer
-
-@onready
-var debug_label: Label = $DebugLabel
-
-var songs: Array= []
+var songs: Array = []
 var current_player_row: PlayerRow
 
 ## True while statistics are off because a player won, until points are reset.
@@ -65,6 +24,21 @@ var stats_paused_by_win: bool = false
 ## Dims the window behind an open popup and keeps clicks from reaching the buttons under it.
 var popup_backdrop: PopupBackdrop
 
+@onready var open_button: Button = $Open
+@onready var file_dialog: FileDialog = $FileDialog
+@onready var inspiration_list: InspirationList = $InspirationList
+@onready var now_playing: NowPlaying = $NowPlaying
+@onready var players_panel: PlayersPanel = $PlayersPanel
+@onready var toolbar: QuizToolbar = $QuizToolbar
+@onready var settings_popup: SettingsPopup = $SettingsPopup
+@onready var winner_popup: WinnerPopup = %WinnerPopup
+@onready var song_controls: SongControls = $SongControls
+@onready var song_loader: SongLoader = $SongLoader
+@onready var music_list_panel: MusicListPanel = $MusicListPanel
+@onready var character_select_popup: CharacterSelectPopup = %CharacterSelectPopup
+@onready var music_player: MusicPlayer = $MusicPlayer
+@onready var debug_label: Label = $DebugLabel
+
 
 func _ready() -> void:
 	popup_backdrop = PopupBackdrop.add_to(self, _popups())
@@ -83,14 +57,14 @@ func _ready() -> void:
 	song_loader.song_list_loaded.connect(update_song_list)
 	song_loader.song_added.connect(_on_song_added)
 
-	character_select_popup.connect("new_new_character_selected", _on_new_character_selected)
+	character_select_popup.character_selected.connect(_on_new_character_selected)
 	music_list_panel.song_clicked.connect(song_object_clicked)
 	players_panel.player_added.connect(_on_player_added)
 	players_panel.player_removed.connect(_on_player_removed)
 	players_panel.change_character_requested.connect(_on_change_character_requested)
-	music_player.connect("play_next_song", play_next_song)
-	music_player.connect("update_song_list", update_song_list)
-	settings_popup.connect("server_changed", _on_server_changed)
+	music_player.play_next_song.connect(play_next_song)
+	music_player.update_song_list.connect(update_song_list)
+	settings_popup.server_changed.connect(_on_server_changed)
 	settings_popup.visibility_changed.connect(_on_settings_popup_visibility_changed)
 
 	open_button.pressed.connect(open)
@@ -192,7 +166,7 @@ func update_song_list() -> void:
 
 func song_object_clicked(song_no: int) -> void:
 	GameLog.debug("Clicked Song Object: ", Playlist.song_object_array[song_no].to_string())
-	if Settings.character_select_open == false:
+	if !Settings.character_select_open:
 		if Playlist.get_song(song_no) == null:
 			GameLog.debug("has no song, need to download")
 			var song_downloaded: Callable = func song_downloaded(body: PackedByteArray) -> void:
@@ -233,12 +207,12 @@ func show_settings() -> void:
 
 # Each new player's points reach the music player, the log and the winner popup.
 func _on_player_added(new_player_object: PlayerObject) -> void:
-	new_player_object.connect("first_point_triggerd", music_player._on_point_triggered.bind("first"))
-	new_player_object.connect("match_point_triggerd", music_player._on_point_triggered.bind("match"))
-	new_player_object.connect("winner_triggerd", _on_player_won.bind(new_player_object))
-	new_player_object.connect("point_given_sound", _on_make_point_given_sound)
-	new_player_object.connect("player_point_given", _on_point_given.bind(new_player_object))
-	new_player_object.connect("player_point_taken", _on_point_taken.bind(new_player_object))
+	new_player_object.first_point_triggered.connect(music_player._on_point_triggered.bind("first"))
+	new_player_object.match_point_triggered.connect(music_player._on_point_triggered.bind("match"))
+	new_player_object.winner_triggered.connect(_on_player_won.bind(new_player_object))
+	new_player_object.point_given_sound.connect(_on_make_point_given_sound)
+	new_player_object.player_point_given.connect(_on_point_given.bind(new_player_object))
+	new_player_object.player_point_taken.connect(_on_point_taken.bind(new_player_object))
 
 
 func _on_point_given(player_object: PlayerObject) -> void:
@@ -293,6 +267,7 @@ func _on_new_character_selected(character_texture: ImageTexture) -> void:
 
 var local_path: String = '/Users/sebastian/ResilioSync/Sorterat_test/Metal Gear Solid 4 - Guns of the Patriots/2-16 Metal Gear Saga.mp3'
 
+
 func open() -> void:
 	file_dialog.popup()
 

scroll_to_end_container.gd

@@ -1,9 +1,12 @@
 class_name ScrollToEndContainer
 extends ScrollContainer
+## A scroll container that scrolls to the end whenever its content grows, so the newest
+## item is always in view.
 
-var max_value = 0;
+var max_value: float = 0.0
 
-func _draw():
-	if max_value != self.get_v_scroll_bar().max_value:
-		max_value = self.get_v_scroll_bar().max_value
-		self.scroll_vertical = max_value
+
+func _draw() -> void:
+	if max_value != get_v_scroll_bar().max_value:
+		max_value = get_v_scroll_bar().max_value
+		scroll_vertical = int(max_value)

search_popup.gd

@@ -1,65 +1,65 @@
 class_name SearchPopup
 extends BasePopup
-
-@onready
-var search_list: VBoxContainer = %SearchResults
-
-@onready
-var search_panel: Panel = %SearchPanel
-
-@onready
-var clear_button: Button = $ClearButton
-
-@onready
-var search_bar: TextEdit = $Searchbar
+## Searches every soundtrack on the server as you type. Matches ignore case, spaces and
+## special characters, and also find the letters in order with others in between.
 
 var soundtracks: Array = []
 
-# Precomputed soundtrack data: array of dicts with original, lowercase, and cleaned fields
+## Each soundtrack as a Dictionary with its original, lowercase and cleaned name.
 var precomputed_soundtracks: Array = []
 
-# Regex cache: maps cleaned search terms to compiled RegEx objects
+## Compiled patterns for the letters-in-order search, by cleaned search term.
 var regex_cache: Dictionary = {}
 
 var label_pool: Array[Label] = []
 
-# Called when the node enters the scene tree for the first time.
+@onready var search_list: VBoxContainer = %SearchResults
+@onready var search_panel: Panel = %SearchPanel
+@onready var clear_button: Button = $ClearButton
+@onready var search_bar: TextEdit = $Searchbar
+
+
 func _ready() -> void:
 	clear_button.pressed.connect(clear)
 	search_bar.grab_focus()
 	search_bar.text_changed.connect(search)
 	visibility_changed.connect(focus)
 
+
 func focus() -> void:
-	if self.visible == true:
+	if visible:
 		search_bar.grab_focus()
 		clear()
 
+
 func close() -> void:
 	clear()
 	super()
 
+
 func search() -> void:
 	GameLog.debug(search_bar.text)
 	var search_text: String = search_bar.text
-	
+
 	if search_text == "":
 		show_all_soundtracks()
 		return
-	
+
 	perform_search(search_text)
 
+
 func show_all_soundtracks() -> void:
 	# Hide all visible labels and add to pool
 	for child: Label in search_list.get_children():
 		if child.visible:
 			child.visible = false
 			label_pool.append(child)
-	
+
 	# Show all soundtracks in order
 	for soundtrack: String in soundtracks:
 		add_soundtrack_reuse(soundtrack)
 
+
 func perform_search(search_text: String) -> void:
 	# Hide all visible labels and add to pool
 	for child: Label in search_list.get_children():
@@ -70,6 +70,7 @@ func perform_search(search_text: String) -> void:
 	for soundtrack: String in find_matches(search_text):
 		add_soundtrack_reuse(soundtrack)
 
+
 ## Returns the soundtracks matching [param search_text], best matches first: plain
 ## case-insensitive matches, then matches ignoring spaces and special characters,
 ## then matches with the letters in order but not next to each other.
@@ -81,25 +82,25 @@ func find_matches(search_text: String) -> Array[String]:
 	var matches: Array[String] = []
 
 	# Pass 1: Exact case-insensitive contains match on lowercase versions
-	for i in range(precomputed_soundtracks.size()):
-		var st_data = precomputed_soundtracks[i]
+	for i: int in range(precomputed_soundtracks.size()):
+		var st_data: Dictionary = precomputed_soundtracks[i]
 		if st_data["lowercase"].contains(search_text_lower):
 			if not st_data["original"] in seen:
 				seen[st_data["original"]] = true
 				matches.append(st_data["original"])
 
 	# Pass 2: Contains match on cleaned terms
-	for i in range(precomputed_soundtracks.size()):
-		var st_data = precomputed_soundtracks[i]
+	for i: int in range(precomputed_soundtracks.size()):
+		var st_data: Dictionary = precomputed_soundtracks[i]
 		if st_data["cleaned"].contains(clean_search_text):
 			if not st_data["original"] in seen:
 				seen[st_data["original"]] = true
 				matches.append(st_data["original"])
 
 	# Pass 3: Regex match on cleaned terms
-	var regex = compile_regex_cached(clean_search_text)
-	for i in range(precomputed_soundtracks.size()):
-		var st_data = precomputed_soundtracks[i]
+	var regex: RegEx = compile_regex_cached(clean_search_text)
+	for i: int in range(precomputed_soundtracks.size()):
+		var st_data: Dictionary = precomputed_soundtracks[i]
 		if regex.search(st_data["cleaned"]):
 			if not st_data["original"] in seen:
 				seen[st_data["original"]] = true
@@ -107,30 +108,35 @@ func find_matches(search_text: String) -> Array[String]:
 
 	return matches
 
-# Cleans a term by removing spaces and replacing special characters.
-# Matches MusicServer's clean_term() function.
-func clean_term(term: String) -> String:
-	return term.replace(" ", "").replace("é", "e").replace("+", "plus").replace("&", "and").replace("'n", "and").to_lower()
 
-# Compiles a regex pattern with caching to avoid recompiling the same pattern multiple times.
+## Cleans a term by removing spaces and replacing special characters.
+## Matches MusicServer's clean_term() function.
+func clean_term(term: String) -> String:
+	return term.replace(" ", "").replace("é", "e").replace("+", "plus").replace("&", "and") \
+			.replace("'n", "and").to_lower()
+
+
+## Compiles the letters-in-order pattern for [param search_term], once per term.
 func compile_regex_cached(search_term: String) -> RegEx:
 	if not search_term in regex_cache:
-		var regex = RegEx.new()
-		var regText: String = ".*"
+		var regex: RegEx = RegEx.new()
+		var regex_text: String = ".*"
 		for letter: String in search_term:
 			# Escape regex metacharacters so searches like "Q*bert" or "(Remix)" work
 			if "\\^$.|?*+()[]{}".contains(letter):
-				regText += "\\"
-			regText += letter + ".*"
-		regex.compile(regText)
+				regex_text += "\\"
+			regex_text += letter + ".*"
+		regex.compile(regex_text)
 		regex_cache[search_term] = regex
 	return regex_cache[search_term]
 
+
 func add_soundtrack(soundtrack: String) -> void:
 	# Backward compatibility - delegates to reuse version
 	add_soundtrack_reuse(soundtrack)
 
-# Optimized version that reuses label nodes from pool instead of creating new ones
+
+## Shows [param soundtrack], reusing a hidden label from the pool when there is one.
 func add_soundtrack_reuse(soundtrack: String) -> void:
 	var label: Label
 	if label_pool.size() > 0:
@@ -146,6 +152,7 @@ func add_soundtrack_reuse(soundtrack: String) -> void:
 		search_list.add_child(label)
 		label.visible = true
 
+
 func check_if_soundtrack_exists(soundtrack: String) -> bool:
 	var soundtrack_exists: bool = false
 	for child: Label in search_list.get_children():
@@ -153,9 +160,10 @@ func check_if_soundtrack_exists(soundtrack: String) -> bool:
 			soundtrack_exists = true
 	return soundtrack_exists
 
+
 func get_list_of_soundtracks() -> void:
 	GameLog.debug("get_list_of_soundtracks")
-	var handle_soundtracks: Callable = func handle_soundtracks(array) -> void:
+	var handle_soundtracks: Callable = func handle_soundtracks(array: Variant) -> void:
 		if typeof(array) == TYPE_ARRAY:
 			# Reuse existing labels: hide all and add to pool
 			for child: Label in search_list.get_children():
@@ -168,6 +176,7 @@ func get_list_of_soundtracks() -> void:
 			GameLog.warning("Unexpected data")
 	MusicServerClient.fetch_all_soundtracks_ordered(handle_soundtracks)
 
+
 ## Replaces the searchable soundtracks and precomputes their search forms.
 func set_soundtracks(list: Array) -> void:
 	soundtracks = []
@@ -180,6 +189,7 @@ func set_soundtracks(list: Array) -> void:
 			"cleaned": clean_term(soundtrack)
 		})
 
+
 func clear() -> void:
 	search_bar.text = ""
 	show_all_soundtracks()

settings.gd

@@ -1,14 +1,14 @@
 extends Node
+## The game settings and the players, shared by the whole game.
+##
+## Registered as the [code]Settings[/code] autoload.
 
 const MAX_NUMBER_OF_PLAYERS: int = 7
 
 var default_path: String = "https://music.sanplex.xyz"
 var selected_server: int = 0
-
 var is_local: bool = false
-
 var is_debug: bool = false
-
 var stop_after_current: bool = true
 var auto_repeat_song: bool = true
 var hide_next_track: bool = true
@@ -22,7 +22,6 @@ var hide_for_seconds: float = 5.0
 var hide_beginning: bool = false
 var hide_length: bool = false
 var hide_ticks: bool = false
-
 var player_array: Array[PlayerObject]
 var edit_players: bool = false
 var currently_syncing: bool = false
@@ -32,6 +31,7 @@ var character_select_open: bool = false
 ## Releases are made from it, see RELEASING.md.
 var version: String = ProjectSettings.get_setting("application/config/version", "")
 
+
 func delete_children(node: Node) -> void:
 	for n: Node in node.get_children():
 		node.remove_child(n)

settings_popup.gd

@@ -1,82 +1,40 @@
 class_name SettingsPopup
 extends BasePopup
+## The settings: how songs are shown and played, the winning score, the song cache,
+## which MusicServer to use and fullscreen.
 
-@onready
-var settings_panel: Panel = %SettingsPanel
-
-@onready
-var stop_after_current_button: CheckButton = %StopAfterCurrentCheckButton
-
-@onready
-var hide_next_track_button: CheckButton = %HideNextTrackCheckButton
-
-@onready
-var add_to_database_button: CheckButton = %AddToDatabaseCheckButton
-
-@onready
-var low_played_button: CheckButton = %LowPlayedCheckButton
-
-@onready
-var hide_beginning_button: CheckButton = %HideBeginningCheckButton
-
-@onready
-var hide_length_button: CheckButton = %HideLengthCheckButton
-
-@onready
-var hide_ticks_button: CheckButton = %HideTicksCheckButton
-
-@onready
-var score_label: Label = %ScoreLabel
-
-@onready
-var lower_winning_score_button: Button = %LowerButton
-
-@onready
-var increase_winning_score_button: Button = %IncreaseButton
-
-@onready
-var cache_label: Label = %CacheLabel
-
-@onready
-var lower_cache_button: Button = %LowerCacheButton
-
-@onready
-var increase_cache_button: Button = %IncreaseCacheButton
-
-@onready
-var inspiration_speed_label: Label = %InspirationListSpeedLabel
-
-@onready
-var lower_inspiration_speed_button: Button = %LowerInspirationSpeedButton
-
-@onready
-var increase_inspiration_speed_button: Button = %IncreaseInspirationSpeedButton
-
-@onready
-var hide_for_seconds_label: Label = %HideForSecondsLabel
-
-@onready
-var lower_hide_for_seconds_button: Button = %LowerHideForSecondsButton
-
-@onready
-var increase_hide_for_seconds_button: Button = %IncreaseHideForSecondsButton
-
-@onready
-var select_server_button: OptionButton = %SelectServerButton
-
-@onready
-var fullscreen_button: CheckButton = %FullscreenButton
-
-@onready
-var local_button: CheckButton = %LocalButton
-
+## Emitted when another MusicServer is picked.
 signal server_changed
 
-# Called when the node enters the scene tree for the first time.
+@onready var settings_panel: Panel = %SettingsPanel
+@onready var stop_after_current_button: CheckButton = %StopAfterCurrentCheckButton
+@onready var hide_next_track_button: CheckButton = %HideNextTrackCheckButton
+@onready var add_to_database_button: CheckButton = %AddToDatabaseCheckButton
+@onready var low_played_button: CheckButton = %LowPlayedCheckButton
+@onready var hide_beginning_button: CheckButton = %HideBeginningCheckButton
+@onready var hide_length_button: CheckButton = %HideLengthCheckButton
+@onready var hide_ticks_button: CheckButton = %HideTicksCheckButton
+@onready var score_label: Label = %ScoreLabel
+@onready var lower_winning_score_button: Button = %LowerButton
+@onready var increase_winning_score_button: Button = %IncreaseButton
+@onready var cache_label: Label = %CacheLabel
+@onready var lower_cache_button: Button = %LowerCacheButton
+@onready var increase_cache_button: Button = %IncreaseCacheButton
+@onready var inspiration_speed_label: Label = %InspirationListSpeedLabel
+@onready var lower_inspiration_speed_button: Button = %LowerInspirationSpeedButton
+@onready var increase_inspiration_speed_button: Button = %IncreaseInspirationSpeedButton
+@onready var hide_for_seconds_label: Label = %HideForSecondsLabel
+@onready var lower_hide_for_seconds_button: Button = %LowerHideForSecondsButton
+@onready var increase_hide_for_seconds_button: Button = %IncreaseHideForSecondsButton
+@onready var select_server_button: OptionButton = %SelectServerButton
+@onready var fullscreen_button: CheckButton = %FullscreenButton
+@onready var local_button: CheckButton = %LocalButton
+
+
 func _ready() -> void:
 	fullscreen_button.button_pressed = Settings.fullscreen
 	select_server_button.selected = Settings.selected_server
-	
+
 	stop_after_current_button.pressed.connect(stop_after_current)
 	hide_next_track_button.pressed.connect(hide_next_track)
 	add_to_database_button.pressed.connect(add_to_database)
@@ -94,7 +52,7 @@ func _ready() -> void:
 	increase_hide_for_seconds_button.pressed.connect(increase_hide_for_seconds)
 	fullscreen_button.pressed.connect(fullscreen)
 	local_button.pressed.connect(local_play)
-	
+
 	stop_after_current_button.button_pressed = Settings.stop_after_current
 	hide_next_track_button.button_pressed = Settings.hide_next_track
 	add_to_database_button.button_pressed = Settings.add_to_stats
@@ -114,95 +72,117 @@ func _ready() -> void:
 	# Alt+Enter switches fullscreen from the main window, which resizes the window
 	get_window().size_changed.connect(_update_fullscreen_button)
 
+
 # Settings can change outside this popup, e.g. winning turns statistics off
 func _on_visibility_changed() -> void:
 	if visible:
 		add_to_database_button.button_pressed = Settings.add_to_stats
 		_update_fullscreen_button()
 
+
 func _update_fullscreen_button() -> void:
 	fullscreen_button.set_pressed_no_signal(Settings.fullscreen)
 
+
 func fullscreen() -> void:
 	Settings.fullscreen = !Settings.fullscreen
-	if Settings.fullscreen == true:
+	if Settings.fullscreen:
 		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)
-	if Settings.fullscreen == false:
+	if !Settings.fullscreen:
 		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
 
+
 func local_play() -> void:
 	Settings.play_local = !Settings.play_local
-	
+
+
 func stop_after_current() -> void:
 	Settings.stop_after_current = !Settings.stop_after_current
 
+
 func hide_next_track() -> void:
 	Settings.hide_next_track = !Settings.hide_next_track
-	
+
+
 func add_to_database() -> void:
 	Settings.add_to_stats = !Settings.add_to_stats
-	
+
+
 func low_played() -> void:
 	Settings.use_low_played_mode = !Settings.use_low_played_mode
 
+
 func hide_beginning() -> void:
 	Settings.hide_beginning = !Settings.hide_beginning
 	update_hide_for_seconds_enabled()
 
+
 func update_hide_for_seconds_enabled() -> void:
 	var enabled: bool = Settings.hide_beginning
 	%HideForSecondsHBoxContainer.visible = enabled
 
+
 func hide_length() -> void:
 	Settings.hide_length = !Settings.hide_length
 
+
 func hide_ticks() -> void:
 	Settings.hide_ticks = !Settings.hide_ticks
 
+
 func lower_winning_score() -> void:
 	Settings.winning_score = max(Settings.winning_score - 1, 1)
 	score_label.text = str(Settings.winning_score)
 
+
 func increase_winning_score() -> void:
 	Settings.winning_score += 1
 	score_label.text = str(Settings.winning_score)
 
+
 func set_winning_score(new_score: int) -> void:
 	Settings.winning_score = new_score
 	score_label.text = str(Settings.winning_score)
 
+
 func lower_cache() -> void:
 	Playlist.number_of_tracks_to_preload -= 1
 	if Playlist.number_of_tracks_to_preload < 1:
 		Playlist.number_of_tracks_to_preload = 1
 	cache_label.text = str(Playlist.number_of_tracks_to_preload)
 
+
 func increase_cache() -> void:
 	Playlist.number_of_tracks_to_preload += 1
 	cache_label.text = str(Playlist.number_of_tracks_to_preload)
 
+
 func lower_inspiration_speed() -> void:
 	Settings.inspiration_list_speed -= 1
 	if Settings.inspiration_list_speed < 1:
 		Settings.inspiration_list_speed = 1
 	inspiration_speed_label.text = str(Settings.inspiration_list_speed)
 
+
 func increase_inspiration_speed() -> void:
 	Settings.inspiration_list_speed  += 1
 	inspiration_speed_label.text = str(Settings.inspiration_list_speed )
 
+
 func lower_hide_for_seconds() -> void:
 	Settings.hide_for_seconds -= 1.0
 	if Settings.hide_for_seconds < 0:
 		Settings.hide_for_seconds = 0
 	hide_for_seconds_label.text = str(Settings.hide_for_seconds)
 
+
 func increase_hide_for_seconds() -> void:
 	Settings.hide_for_seconds += 1.0
 	if Settings.hide_for_seconds > 10.0:
 		Settings.hide_for_seconds = 10.0
 	hide_for_seconds_label.text = str(Settings.hide_for_seconds)
 
+
 func select_server(new_server: int) -> void:
 	GameLog.debug("select_server")
 	Settings.default_path = select_server_button.get_item_text(new_server)
@@ -210,9 +190,11 @@ func select_server(new_server: int) -> void:
 	GameLog.debug("Settings.default_path: " + Settings.default_path)
 	GameLog.debug("Settings.selected_server: " + str(Settings.selected_server))
 	GameLog.debug("new_server: " + str(new_server))
-	GameLog.debug("select_server_button.get_item_text(new_server): " + select_server_button.get_item_text(new_server))
+	GameLog.debug("select_server_button.get_item_text(new_server): ",
+			select_server_button.get_item_text(new_server))
 	server_changed.emit()
 
+
 func set_selected_server(new_server: int) -> void:
 	GameLog.debug("set_selected_server")
 	select_server_button.select(new_server)
@@ -221,5 +203,6 @@ func set_selected_server(new_server: int) -> void:
 	GameLog.debug("Settings.default_path: " + Settings.default_path)
 	GameLog.debug("Settings.selected_server: " + str(Settings.selected_server))
 	GameLog.debug("new_server: " + str(new_server))
-	GameLog.debug("select_server_button.get_item_text(new_server): " + select_server_button.get_item_text(new_server))
+	GameLog.debug("select_server_button.get_item_text(new_server): ",
+			select_server_button.get_item_text(new_server))
 	server_changed.emit()

shortcuts_popup.gd

@@ -1,11 +1,6 @@
 class_name ShortcutsPopup
 extends BasePopup
-
-@onready
-var shortcuts_vbox: VBoxContainer = %shortcutsVBox
-
-@onready
-var shortcuts_panel: Panel = %ShortcutsPanel
+## Lists the keyboard shortcuts. Opened with Alt+K or the Shortcuts button.
 
 var shortcuts_dic: Dictionary = {
 	"Alt + S": "Search",
@@ -26,14 +21,17 @@ var shortcuts_dic: Dictionary = {
 	"Alt + Ctrl + 1 - 9": "Take point from player",
 }
 
+@onready var shortcuts_vbox: VBoxContainer = %shortcutsVBox
+@onready var shortcuts_panel: Panel = %ShortcutsPanel
+
+
 #Color(0.18, 0.18, 0.18)
 #Color(0.302, 0.302, 0.302)
 #Color(0.259, 0.259, 0.259)
-
 func _ready() -> void:
 	shortcuts_dic.sort()
 	Settings.delete_children(shortcuts_vbox)
-	
+
 	var title: Label = Label.new()
 	title.add_theme_font_size_override("font_size", 20)
 	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
@@ -45,28 +43,26 @@ func _ready() -> void:
 		var panel: PanelContainer = PanelContainer.new()
 		var hbox: HBoxContainer = HBoxContainer.new()
 		hbox.alignment = BoxContainer.ALIGNMENT_CENTER
-		
+
 		var label: Label = Label.new()
 		label.add_theme_font_size_override("font_size", 20)
 		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 		label.text = shortcut
 		label.autowrap_mode = TextServer.AUTOWRAP_WORD
 		label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
-		
+
 		var label2: Label = Label.new()
 		label2.add_theme_font_size_override("font_size", 20)
 		label2.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 		label2.text = shortcuts_dic[shortcut]
 		label2.autowrap_mode = TextServer.AUTOWRAP_WORD
 		label2.size_flags_horizontal = Control.SIZE_EXPAND_FILL
-		
+
 		if count % 2 == 0:
 			var new_stylebox_normal: Resource = panel.get_theme_stylebox("panel").duplicate()
 			new_stylebox_normal.bg_color = Color(0.18, 0.18, 0.18)
 			panel.add_theme_stylebox_override("panel", new_stylebox_normal)
-			#label.add_theme_stylebox_override("normal", new_stylebox_normal)
-			#label2.add_theme_stylebox_override("normal", new_stylebox_normal)
-		
+
 		hbox.add_child(label)
 		hbox.add_child(label2)
 		panel.add_child(hbox)

song_loader.gd

@@ -8,6 +8,7 @@ extends Node
 
 ## Emitted when the songs already in the server playlist have been loaded into the
 ## Playlist.
+
 signal song_list_loaded
 
 ## Emitted when a new song has been downloaded and added to the Playlist.
@@ -21,7 +22,7 @@ var retry_seconds: float = 5.0
 ## Preloading waits for the list, because loading the list clears the playlist.
 func load_song_list() -> void:
 	GameLog.debug("load_song_list")
-	var song_list_fetched: Callable = func song_list_fetched(data) -> void:
+	var song_list_fetched: Callable = func song_list_fetched(data: Variant) -> void:
 		Playlist.clear_song_list()
 		if typeof(data) == TYPE_ARRAY:
 			for d: Dictionary in data:

song_object.gd

@@ -3,53 +3,57 @@ extends RefCounted
 class_name SongObject
 
 var song_number: int
-
 var song_title: String
-
 var soundtrack_title: String
 
 ## Ids of the players who got a point for this song.
 var players_given_point: Array[String] = []
 
 var is_answered: bool = false
-
 var has_played: bool = false
-
 var is_playing: bool = false
-
 var song: AudioStream
 
+
 func get_soundtrack_title() -> String:
 	if is_answered:
 		return soundtrack_title
 	else:
 		return "????????"
 
+
 func get_song_title() -> String:
 	if is_answered:
 		return song_title
 	else:
 		return "??????"
 
+
 func get_song_info() -> String:
 	if Settings.is_debug:
 		var format_string: String = "%d. %s - %s | played: %s | answered: %s"
-		return format_string % [(song_number + 1), soundtrack_title, song_title, has_played, is_answered]
+		return format_string % [(song_number + 1), soundtrack_title, song_title, has_played,
+				is_answered]
 	elif is_answered:
 		var format_string: String = "%d. %s - %s"
 		return format_string % [(song_number + 1), soundtrack_title, song_title]
 	else:
 		return "??? - ???"
 
+
 func add_point(player_id: String) -> void:
 	GameLog.debug("add_point")
 	if !players_given_point.has(player_id):
 		players_given_point.append(player_id)
 
+
 func remove_point(player_id: String) -> void:
 	GameLog.debug("remove_point")
 	players_given_point.erase(player_id)
 
+
 func _to_string() -> String:
-	var format_string: String = "song_number: %d | soundtrack_title: %s | song_title: %s | is_answered: %s | has_played: %s | is_playing: %s"
-	return format_string % [(song_number), soundtrack_title, song_title, is_answered, has_played, is_playing]
+	var format_string: String = "song_number: %d | soundtrack_title: %s | song_title: %s" \
+			+ " | is_answered: %s | has_played: %s | is_playing: %s"
+	return format_string % [song_number, soundtrack_title, song_title, is_answered, has_played,
+			is_playing]

song_row.gd

@@ -1,33 +1,19 @@
 class_name SongRow
 extends PanelContainer
-
-@onready
-var song_list_label: Label = %SongListLabel
-
-@onready
-var song_list_players: HBoxContainer = %SongListPlayers
+## One song in the music list: its number, soundtrack and title, and a marker for
+## each player who got a point for it.
 
 var song_object: SongObject
 
-#Color(0.18, 0.18, 0.18)
-#Color(0.302, 0.302, 0.302)
-#Color(0.259, 0.259, 0.259)
+@onready var song_list_label: Label = %SongListLabel
+@onready var song_list_players: HBoxContainer = %SongListPlayers
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
-	#if song_object != null && song_object.song_number % 2 == 0:
-	#	var new_stylebox_normal = self.get_theme_stylebox("panel").duplicate()
-	#	new_stylebox_normal.bg_color = Color(0.18, 0.18, 0.18)
-	#	self.add_theme_stylebox_override("panel", new_stylebox_normal)
-	#	song_list_label.add_theme_stylebox_override("normal", new_stylebox_normal)
-	#else:
-	#	var new_stylebox_normal = self.get_theme_stylebox("panel").duplicate()
-	#	new_stylebox_normal.bg_color = Color(0.18, 0.18, 0.18)
-	#	self.add_theme_stylebox_override("panel", new_stylebox_normal)
-	#	song_list_label.add_theme_stylebox_override("normal", new_stylebox_normal)
 	set_label()
 	update_players()
 
+
 func set_label() -> void:
 	if song_object != null:
 		var size_to_change: int = song_object.players_given_point.size() * 50
@@ -36,6 +22,7 @@ func set_label() -> void:
 			song_list_label.add_theme_color_override("font_color", Color(1, 0.5, 0))
 		song_list_label.text = song_object.get_song_info()
 
+
 func update_players() -> void:
 	Settings.delete_children(song_list_players)
 	if song_object != null:

sync_popup.gd

@@ -1,79 +1,49 @@
 class_name SyncPopup
 extends BasePopup
+## Asks the server to sync its soundtracks with the music folder, shows the progress,
+## and then lists what was added, changed or removed.
 
-@onready
-var sync_panel: Panel = %SyncPanel
-
-@onready
-var sync_title_label: Label = %SyncTitleLabel
-
-@onready
-var no_changes_label: Label = %NoChangesLabel
-
-@onready
-var progress_hbox: HBoxContainer = %ProgressHBoxContainer
-
-@onready
-var sync_hbox: HBoxContainer = %SyncHBoxContainer
-
-@onready
-var sync_progress_bar: ProgressBar = %SyncProgressBar
-
-@onready
-var soundtracks_added_vbox: VBoxContainer = %SoundtracksAddedVBox
-
-@onready
-var soundtracks_added_separator: VSeparator = %SoundtracksAddedSeparator
-
-@onready
-var soundtracks_readded_vbox: VBoxContainer = %SoundtracksReAddedVBox
-
-@onready
-var soundtracks_readded_separator: VSeparator = %SoundtracksReAddedSeparator
-
-@onready
-var soundtracks_changed_title_vbox: VBoxContainer = %SoundtracksChangedTitleVBox
-
-@onready
-var soundtracks_changed_title_separator: VSeparator = %SoundtracksChangedTitleSeparator
-
-@onready
-var soundtracks_changed_content_vbox: VBoxContainer = %SoundtracksChangedContentVBox
-
-@onready
-var soundtracks_changed_content_separator: VSeparator = %SoundtracksChangedContentSeparator
-
-@onready
-var soundtracks_removed_vbox: VBoxContainer = %SoundtracksRemovedVBox
-
-@onready
-var soundtracks_removed_separator: VSeparator = %SoundtracksRemovedSeparator
-
-@onready
-var catched_errors_vbox: VBoxContainer = %CatchedErrorsVBox
-
-@onready
-var sync_time: Label = %SyncTime
-
-@onready
-var sync_timer: Timer = %SyncTimer
-
-@onready
-var restart_sync_button: Button = %RestartSyncButton
-
-var changes: bool = false
-
-var has_synced: bool = false
+## Emitted when the server has started syncing.
 
 signal sync_started
+## Emitted when the sync is done and its result is shown.
 signal sync_finished
 
+var changes: bool = false
+var has_synced: bool = false
+
+@onready var sync_panel: Panel = %SyncPanel
+@onready var sync_title_label: Label = %SyncTitleLabel
+@onready var no_changes_label: Label = %NoChangesLabel
+@onready var progress_hbox: HBoxContainer = %ProgressHBoxContainer
+@onready var sync_hbox: HBoxContainer = %SyncHBoxContainer
+@onready var sync_progress_bar: ProgressBar = %SyncProgressBar
+@onready var soundtracks_added_vbox: VBoxContainer = %SoundtracksAddedVBox
+@onready var soundtracks_added_separator: VSeparator = %SoundtracksAddedSeparator
+@onready var soundtracks_readded_vbox: VBoxContainer = %SoundtracksReAddedVBox
+@onready var soundtracks_readded_separator: VSeparator = %SoundtracksReAddedSeparator
+@onready var soundtracks_changed_title_vbox: VBoxContainer = %SoundtracksChangedTitleVBox
+@onready var soundtracks_changed_title_separator: VSeparator = %SoundtracksChangedTitleSeparator
+@onready var soundtracks_changed_content_vbox: VBoxContainer = %SoundtracksChangedContentVBox
+@onready var soundtracks_changed_content_separator: VSeparator = %SoundtracksChangedContentSeparator
+@onready var soundtracks_removed_vbox: VBoxContainer = %SoundtracksRemovedVBox
+@onready var soundtracks_removed_separator: VSeparator = %SoundtracksRemovedSeparator
+@onready var caught_errors_vbox: VBoxContainer = %CaughtErrorsVBox
+@onready var sync_time: Label = %SyncTime
+@onready var sync_timer: Timer = %SyncTimer
+@onready var restart_sync_button: Button = %RestartSyncButton
+
+
 func _ready() -> void:
 	sync_timer.timeout.connect(_on_sync_timeout)
 	restart_sync_button.pressed.connect(start_sync)
 	restart_sync_button.visible = false
 
-func show_section_if_has_data(data: Variant, vbox: VBoxContainer, separator: VSeparator, header_text: String) -> bool:
+
+## Lists [param data] under [param header_text] in [param vbox] and returns true, or hides
+## the column and its separator when there is nothing to list.
+func show_section_if_has_data(data: Variant, vbox: VBoxContainer, separator: VSeparator,
+		header_text: String) -> bool:
 	if data != null && data.size() > 0:
 		vbox.visible = true
 		make_list(data, vbox, header_text)
@@ -83,9 +53,10 @@ func show_section_if_has_data(data: Variant, vbox: VBoxContainer, separator: VSe
 		separator.visible = false
 		return false
 
+
 func start_sync() -> void:
 	GameLog.debug("start_sync")
-	self.visible = true
+	visible = true
 	if has_synced:
 		# Already synced, just show the results
 		show_sync_result()
@@ -98,6 +69,7 @@ func start_sync() -> void:
 	if !Settings.currently_syncing:
 		MusicServerClient.start_sync(sync_request_sent)
 
+
 func _on_sync_timeout() -> void:
 	GameLog.debug("_on_sync_timeout!")
 	var get_progress: Callable = func get_progress(data_received: Dictionary) -> void:
@@ -111,38 +83,46 @@ func _on_sync_timeout() -> void:
 				on_sync_finished(data_received)
 	MusicServerClient.fetch_sync_progress(get_progress)
 
+
 func on_sync_finished(data_received: Dictionary) -> void:
 	has_synced = true
 	reset_sync_result()
-	
-	if show_section_if_has_data(data_received.soundtracks_added, soundtracks_added_vbox, soundtracks_added_separator, "Added"):
+
+	if show_section_if_has_data(data_received.soundtracks_added, soundtracks_added_vbox,
+			soundtracks_added_separator, "Added"):
 		changes = true
-	
-	if show_section_if_has_data(data_received.soundtracks_re_added, soundtracks_readded_vbox, soundtracks_readded_separator, "Re-added"):
+
+	if show_section_if_has_data(data_received.soundtracks_re_added, soundtracks_readded_vbox,
+			soundtracks_readded_separator, "Re-added"):
 		changes = true
-	
-	if data_received.soundtracks_changed_title != null && data_received.soundtracks_changed_title.size() > 0:
+
+	var changed_titles: Variant = data_received.soundtracks_changed_title
+	if changed_titles != null && changed_titles.size() > 0:
 		changes = true
 		Settings.delete_children(soundtracks_changed_title_vbox)
 		make_header_label(soundtracks_changed_title_vbox, "Changed Title")
 		var row: int = 0
-		for old_soundtrack_title: String in data_received.soundtracks_changed_title:
-			var new_soundtrack_title: String = data_received.soundtracks_changed_title[old_soundtrack_title]
+		for old_soundtrack_title: String in changed_titles:
+			var new_soundtrack_title: String = changed_titles[old_soundtrack_title]
 			soundtracks_changed_title_vbox.add_child(make_soundtrack_row(
 					old_soundtrack_title + "\nchanged title to\n" + new_soundtrack_title, row))
 			row += 1
 		soundtracks_changed_title_vbox.visible = true
-	
-	if show_section_if_has_data(data_received.soundtracks_changed_content, soundtracks_changed_content_vbox, soundtracks_changed_content_separator, "Changed Content"):
+
+	if show_section_if_has_data(data_received.soundtracks_changed_content,
+			soundtracks_changed_content_vbox, soundtracks_changed_content_separator,
+			"Changed Content"):
 		changes = true
-	
-	if show_section_if_has_data(data_received.soundtracks_removed, soundtracks_removed_vbox, soundtracks_removed_separator, "Removed"):
+
+	if show_section_if_has_data(data_received.soundtracks_removed, soundtracks_removed_vbox,
+			soundtracks_removed_separator, "Removed"):
 		changes = true
-	
+
+	# The server's name for the errors it caught
 	if data_received.catched_errors != null && data_received.catched_errors.size() > 0:
-		catched_errors_vbox.visible = true
-		make_list(data_received.catched_errors, catched_errors_vbox, "Errors")
-	
+		caught_errors_vbox.visible = true
+		make_list(data_received.catched_errors, caught_errors_vbox, "Errors")
+
 	# Separators go only between visible columns, not after the last one
 	var visible_sections: Array = []
 	if soundtracks_added_vbox.visible:
@@ -155,11 +135,11 @@ func on_sync_finished(data_received: Dictionary) -> void:
 		visible_sections.append("changed_content")
 	if soundtracks_removed_vbox.visible:
 		visible_sections.append("removed")
-	
+
 	# Show section separators only if there's a visible section after them
-	for i in range(visible_sections.size()):
-		var section = visible_sections[i]
-		var separator_map = {
+	for i: int in range(visible_sections.size()):
+		var section: String = visible_sections[i]
+		var separator_map: Dictionary = {
 			"added": soundtracks_added_separator,
 			"readded": soundtracks_readded_separator,
 			"changed_title": soundtracks_changed_title_separator,
@@ -171,10 +151,11 @@ func on_sync_finished(data_received: Dictionary) -> void:
 			separator_map[section].visible = true
 		else:
 			separator_map[section].visible = false
-	
+
 	if !changes:
 		no_changes_label.visible = true
-	sync_time.text = "Total time: " + data_received.total_time if data_received.has("total_time") else ""
+	sync_time.text = "Total time: " + data_received.total_time \
+			if data_received.has("total_time") else ""
 	Settings.currently_syncing = false
 	sync_timer.stop()
 	GameLog.debug("sync finished")
@@ -182,9 +163,11 @@ func on_sync_finished(data_received: Dictionary) -> void:
 	restart_sync_button.visible = true
 	sync_finished.emit()
 
-func list_visible(vbox: VBoxContainer, seperator: VSeparator) -> void:
+
+func list_visible(vbox: VBoxContainer, separator: VSeparator) -> void:
 	vbox.visible = true
-	seperator.visible = true
+	separator.visible = true
+
 
 func make_header_label(vbox: VBoxContainer, text: String) -> void:
 	var label: Label = Label.new()
@@ -194,6 +177,7 @@ func make_header_label(vbox: VBoxContainer, text: String) -> void:
 	label.text = text
 	vbox.add_child(label)
 
+
 # Items alternate between white and orange text as well as background shade
 func make_soundtrack_row(text: String, row: int) -> ListRow:
 	var list_row: ListRow = ListRow.create(text, row, 18, HORIZONTAL_ALIGNMENT_CENTER)
@@ -201,6 +185,7 @@ func make_soundtrack_row(text: String, row: int) -> ListRow:
 		list_row.label.add_theme_color_override("font_color", Color(1, 0.5, 0))
 	return list_row
 
+
 func reset_sync_result() -> void:
 	sync_progress_bar.value = 0
 	sync_time.text = ""
@@ -216,7 +201,8 @@ func reset_sync_result() -> void:
 	soundtracks_changed_content_separator.visible = false
 	soundtracks_removed_vbox.visible = false
 	soundtracks_removed_separator.visible = false
-	catched_errors_vbox.visible = false
+	caught_errors_vbox.visible = false
+
 
 func make_list(list: Array, vbox: VBoxContainer, text: String) -> void:
 	Settings.delete_children(vbox)
@@ -224,16 +210,18 @@ func make_list(list: Array, vbox: VBoxContainer, text: String) -> void:
 	for row: int in list.size():
 		vbox.add_child(make_soundtrack_row(list[row], row))
 
+
 func show_sync_result() -> void:
 	sync_title_label.text = "Sync Result"
 	progress_hbox.visible = false
 	sync_hbox.visible = true
 	restart_sync_button.visible = true
-	
+
+
 func show_sync_progress() -> void:
 	sync_title_label.text = "Sync in Progress"
 	progress_hbox.visible = true
 	no_changes_label.visible = false
 	sync_hbox.visible = false
-	catched_errors_vbox.visible = false
+	caught_errors_vbox.visible = false
 	restart_sync_button.visible = false

tests/fakes/ui_tour.gd

@@ -87,6 +87,7 @@ static func prepare_autoloads() -> void:
 func run(on_state: Callable) -> void:
 	# The debug build lowers the winning score on startup; keep it out of reach
 	Settings.winning_score = 20
+	_stop_caret_blink(_main)
 	await _settle()
 	await on_state.call("startup", null)
 
@@ -194,6 +195,14 @@ func _call(method: String, args: Array = []) -> Variant:
 	return _main.callv(method, args)
 
 
+# A blinking text cursor would be shown in some pictures and not in others
+func _stop_caret_blink(node: Node) -> void:
+	if node is TextEdit || node is LineEdit:
+		node.caret_blink = false
+	for child: Node in node.get_children():
+		_stop_caret_blink(child)
+
+
 func _server() -> FakeHttpTransport:
 	return MusicServerClient.transport
 

tests/integration/test_layout_unchanged.gd

@@ -58,9 +58,14 @@ const RENAMED_SCENES: Dictionary = {
 	"Player": "PlayerRow",
 }
 
-## Nodes renamed inside a popup: old path from the main window, and new path.
+const SYNC_COLUMNS: String = "SyncPopup/SyncPanel/ScrollContainer/SyncVBoxContainer"
+
+## Nodes renamed inside a popup: the path after the moves above, and the new path.
 const RENAMED_PATHS: Dictionary = {
 	"SearchPopup/ScrollContainer/VBoxContainer": "SearchPopup/ScrollContainer/SearchResults",
+	SYNC_COLUMNS + "/CatchedErrorsVBox": SYNC_COLUMNS + "/CaughtErrorsVBox",
+	SYNC_COLUMNS + "/CaughtErrorsVBox/CatchedErrorsLabel":
+			SYNC_COLUMNS + "/CaughtErrorsVBox/CaughtErrorsLabel",
 }
 
 ## How far a node may be from its old place, in pixels.
@@ -102,9 +107,10 @@ static func new_path(old_path: String) -> String:
 	var first: String = parts[0]
 	parts[0] = MOVED.get(first, first)
 	var path: String = "/".join(parts)
+	# In order, so a node inside a renamed node is found after its parent's rename
 	for renamed: String in RENAMED_PATHS:
 		if path == renamed || path.begins_with(renamed + "/"):
-			return RENAMED_PATHS[renamed] + path.trim_prefix(renamed)
+			path = RENAMED_PATHS[renamed] + path.trim_prefix(renamed)
 	return path
 
 

tests/integration/test_players_panel.gd

@@ -105,7 +105,8 @@ func test_rows_follow_player_order_and_numbering() -> void:
 	_add("Marle")
 	_add("Lucca")
 
-	assert_array(_rows().map(func(row: PlayerRow) -> String: return row.player_object.player_name)) \
+	assert_array(_rows().map(
+			func(row: PlayerRow) -> String: return row.player_object.player_name)) \
 			.contains_exactly(["Crono", "Marle", "Lucca"])
 	assert_array(_rows().map(func(row: PlayerRow) -> int: return row.list_index)) \
 			.contains_exactly([0, 1, 2])

tests/integration/test_scene_split.gd

@@ -9,6 +9,12 @@ const MAIN_WINDOW_CHILDREN: Array[String] = [
 	"ShortcutsPopup", "StatisticsPopupPanel", "AboutPopup", "LogPopup",
 ]
 
+## The quiz buttons that are disabled while the server syncs.
+const LOCKED_BY_SYNC: Array[String] = [
+	"QuizToolbar/SoundTestButton", "QuizToolbar/ResetPlaylistButton",
+	"SongControls/ShowAnswerButton", "SongControls/NextButton",
+]
+
 const TOP_BAR_CHILDREN: Array[String] = [
 	"TopPanelContainer", "Title", "SyncButton", "SearchButton", "StatisticsButton",
 	"ShortcutsButton", "AboutButton", "QRButton",
@@ -130,7 +136,8 @@ func test_points_from_the_player_list_reach_the_song_and_log() -> void:
 	(_player_row(crono).get_node("HBoxContainer/AddPoint") as BaseButton).pressed.emit()
 
 	assert_array(Playlist.song_object_array[0].players_given_point).contains_exactly([crono.id])
-	assert_int((_window.get_node("%LogPopup").get_node("%LogVBoxContainer") as Node).get_child_count()) \
+	var log_rows: Node = _window.get_node("%LogPopup").get_node("%LogVBoxContainer")
+	assert_int(log_rows.get_child_count()) \
 			.is_equal(1)
 
 
@@ -143,12 +150,13 @@ func test_character_button_in_the_player_list_picks_a_new_character() -> void:
 	assert_bool(character_select.visible).is_true()
 	var texture: ImageTexture = ImageTexture.create_from_image(
 			Image.create(4, 4, false, Image.FORMAT_RGBA8))
-	character_select.new_new_character_selected.emit(texture)
+	character_select.character_selected.emit(texture)
 	assert_object(crono.character).is_same(texture)
 
 
 func test_sound_test_button_fetches_the_sound_test_song() -> void:
-	_server.respond_bytes("/music/soundTest", FileAccess.get_file_as_bytes("res://tests/data/short.mp3"))
+	_server.respond_bytes("/music/soundTest",
+			FileAccess.get_file_as_bytes("res://tests/data/short.mp3"))
 
 	await _click_at(_center(_quiz.get_node("QuizToolbar/SoundTestButton")))
 
@@ -166,7 +174,8 @@ func test_loaded_song_list_shows_in_the_music_list() -> void:
 
 	_quiz.song_loader.load_song_list()
 
-	var rows: Array[Node] = _quiz.get_node("MusicListPanel/ScrollContainer/MusicList").get_children()
+	var rows: Array[Node] = _quiz.get_node("MusicListPanel/ScrollContainer/MusicList") \
+			.get_children()
 	assert_array(rows.map(func(row: SongRow) -> int: return row.song_object.song_number)) \
 			.contains_exactly([0, 1])
 
@@ -203,8 +212,7 @@ func test_sync_disables_quiz_buttons_until_finished() -> void:
 	_top_bar_button("SyncButton").pressed.emit()
 	sync_popup.sync_timer.stop()
 
-	for button_name: String in ["QuizToolbar/SoundTestButton", "QuizToolbar/ResetPlaylistButton", "SongControls/ShowAnswerButton",
-			"SongControls/NextButton"]:
+	for button_name: String in LOCKED_BY_SYNC:
 		assert_bool((_quiz.get_node(button_name) as Button).disabled) \
 				.override_failure_message(button_name + " not disabled").is_true()
 	assert_bool(_top_bar_button("SyncButton").disabled).is_false()
@@ -214,8 +222,7 @@ func test_sync_disables_quiz_buttons_until_finished() -> void:
 	sync_popup._on_sync_timeout()
 	await _runner.simulate_frames(2)
 
-	for button_name: String in ["QuizToolbar/SoundTestButton", "QuizToolbar/ResetPlaylistButton", "SongControls/ShowAnswerButton",
-			"SongControls/NextButton"]:
+	for button_name: String in LOCKED_BY_SYNC:
 		assert_bool((_quiz.get_node(button_name) as Button).disabled) \
 				.override_failure_message(button_name + " still disabled").is_false()
 	# The search list in the main window and the quiz playlist are both reloaded

tests/integration/test_song_loader.gd

@@ -1,7 +1,9 @@
 extends GdUnitTestSuite
 ## Downloading songs into the Playlist ahead of time, against a fake server.
 
-const SONG_INFO: Dictionary = {"SongNo": 0, "Soundtrack": "Chrono Trigger", "Song": "Corridors of Time"}
+const SONG_INFO: Dictionary = {
+	"SongNo": 0, "Soundtrack": "Chrono Trigger", "Song": "Corridors of Time",
+}
 
 var _snapshot: AutoloadSnapshot
 var _server: FakeHttpTransport
@@ -32,7 +34,8 @@ func test_load_song_list_adds_songs_already_played_on_the_server() -> void:
 	_server.respond_json("/music/list", [
 		{"SongNo": 0, "Soundtrack": "Chrono Trigger", "Song": "Corridors of Time"},
 	])
-	_server.respond_json("/music/info", {"SongNo": 1, "Soundtrack": "Final Fantasy VI", "Song": "Dancing Mad"})
+	_server.respond_json("/music/info",
+			{"SongNo": 1, "Soundtrack": "Final Fantasy VI", "Song": "Dancing Mad"})
 	var signals: GdUnitSignalAssert = assert_signal(monitor_signals(_loader))
 
 	_loader.load_song_list()
@@ -57,7 +60,8 @@ func test_fetch_song_downloads_queues_and_adds_the_song() -> void:
 	_loader.fetch_song()
 
 	await signals.is_emitted("song_added")
-	assert_array(_server.requested_paths).contains_exactly(["/music/rand", "/music/addQue", "/music/info"])
+	assert_array(_server.requested_paths) \
+			.contains_exactly(["/music/rand", "/music/addQue", "/music/info"])
 	var song: SongObject = Playlist.song_object_array[0]
 	assert_str(song.song_title).is_equal("Corridors of Time")
 	assert_object(song.song).is_not_null()
@@ -75,7 +79,8 @@ func test_fetch_song_keeps_going_until_the_cache_is_full() -> void:
 
 func test_low_played_mode_uses_its_endpoint() -> void:
 	Settings.use_low_played_mode = true
-	_server.respond_bytes("/music/rand/low", FileAccess.get_file_as_bytes("res://tests/data/short.mp3"))
+	_server.respond_bytes("/music/rand/low",
+			FileAccess.get_file_as_bytes("res://tests/data/short.mp3"))
 
 	_loader.fetch_song()
 

tests/integration/test_sync_popup.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## The sync popup on its own: starting a sync, its progress, and how the result is shown.
 
 var _server: FakeHttpTransport
 var _snapshot: AutoloadSnapshot
@@ -132,7 +133,7 @@ func test_errors_are_listed() -> void:
 
 	_finish_sync(result)
 
-	assert_bool(_node("CatchedErrorsVBox").visible).is_true()
+	assert_bool(_node("CaughtErrorsVBox").visible).is_true()
 
 
 func test_reopening_after_sync_shows_result_without_syncing_again() -> void:
@@ -152,7 +153,7 @@ func test_errors_section_has_errors_header() -> void:
 
 	_finish_sync(result)
 
-	assert_str((_node("CatchedErrorsVBox").get_child(0) as Label).text).is_equal("Errors")
+	assert_str((_node("CaughtErrorsVBox").get_child(0) as Label).text).is_equal("Errors")
 
 
 func test_long_names_wrap_instead_of_widening_the_window() -> void:
@@ -173,7 +174,7 @@ func test_long_names_wrap_instead_of_widening_the_window() -> void:
 	var panel_width: float = (_window.get_node("SyncPanel") as Control).size.x
 	assert_float(_node("SyncHBoxContainer").get_combined_minimum_size().x) \
 			.is_less(panel_width)
-	assert_float(_node("CatchedErrorsVBox").get_combined_minimum_size().x) \
+	assert_float(_node("CaughtErrorsVBox").get_combined_minimum_size().x) \
 			.is_less(panel_width)
 
 

tests/unit/test_list_row.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## ListRow: text, alternating backgrounds and wrapping.
 
 
 func _background(list_row: ListRow) -> Color:

tests/unit/test_music_player_time.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## How the music player shows a song's time, including the hidden parts.
 
 var _music_player: MusicPlayer
 var _hide_beginning: bool

tests/unit/test_music_server_client.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## MusicServerClient: which paths it asks for and how it handles the answers.
 
 var _server: FakeHttpTransport
 
@@ -115,7 +116,8 @@ func test_mark_song_played_sends_put() -> void:
 
 
 func test_character_name_is_url_encoded() -> void:
-	MusicServerClient.fetch_character_image("Paper Mario.png", func(_body: PackedByteArray) -> void: pass)
+	MusicServerClient.fetch_character_image("Paper Mario.png",
+			func(_body: PackedByteArray) -> void: pass)
 
 	assert_array(_server.requested_paths).contains_exactly(["/character?name=Paper%20Mario.png"])
 

tests/unit/test_player_object.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## PlayerObject: points, and the first point, match point and winner signals.
 
 var _winning_score: int
 var _player: PlayerObject
@@ -20,7 +21,7 @@ func test_first_point_triggers_first_point_signal() -> void:
 	_player.add_point()
 
 	assert_int(_player.player_score).is_equal(1)
-	await assert_signal(_player).is_emitted("first_point_triggerd")
+	await assert_signal(_player).is_emitted("first_point_triggered")
 	await assert_signal(_player).is_emitted("player_point_given")
 
 
@@ -30,7 +31,7 @@ func test_one_point_from_winning_triggers_match_point() -> void:
 
 	_player.add_point()
 
-	await assert_signal(_player).is_emitted("match_point_triggerd")
+	await assert_signal(_player).is_emitted("match_point_triggered")
 
 
 func test_reaching_winning_score_triggers_winner() -> void:
@@ -41,7 +42,7 @@ func test_reaching_winning_score_triggers_winner() -> void:
 	_player.add_point()
 
 	assert_int(_player.player_score).is_equal(3)
-	await assert_signal(_player).is_emitted("winner_triggerd")
+	await assert_signal(_player).is_emitted("winner_triggered")
 
 
 func test_score_does_not_go_past_winning_score() -> void:
@@ -91,7 +92,7 @@ func test_dropping_back_to_zero_allows_first_point_again() -> void:
 
 	_player.add_point()
 
-	await assert_signal(_player).is_emitted("first_point_triggerd")
+	await assert_signal(_player).is_emitted("first_point_triggered")
 
 
 func test_reset_points() -> void:
@@ -125,7 +126,7 @@ func test_winning_score_of_one_is_won_with_first_point() -> void:
 
 	_player.add_point()
 
-	await assert_signal(_player).is_emitted("winner_triggerd")
+	await assert_signal(_player).is_emitted("winner_triggered")
 
 
 func test_first_point_is_match_point_when_winning_score_is_two() -> void:
@@ -134,5 +135,5 @@ func test_first_point_is_match_point_when_winning_score_is_two() -> void:
 
 	_player.add_point()
 
-	await assert_signal(_player).is_emitted("match_point_triggerd")
+	await assert_signal(_player).is_emitted("match_point_triggered")
 	assert_bool(_player.is_first_point).is_false()

tests/unit/test_playlist.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## Playlist: moving through the songs, answering them and keeping points.
 
 var _server: FakeHttpTransport
 var _add_to_stats: bool

tests/unit/test_search.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## How the search popup finds and orders matching soundtracks.
 
 const SearchWindowScript: GDScript = preload("res://search_popup.gd")
 
@@ -36,7 +37,8 @@ func test_ignores_spaces() -> void:
 
 
 func test_and_matches_ampersand() -> void:
-	assert_array(_search.find_matches("mario and luigi")).contains(["Mario & Luigi: Superstar Saga"])
+	assert_array(_search.find_matches("mario and luigi")) \
+			.contains(["Mario & Luigi: Superstar Saga"])
 
 
 func test_accented_letters_match_plain_letters() -> void:

tests/unit/test_settings.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## Settings: the version number.
 
 
 func test_version_comes_from_project_settings() -> void:

tests/unit/test_song_object.gd

@@ -1,4 +1,5 @@
 extends GdUnitTestSuite
+## SongObject: what it shows before and after the answer, and its points.
 
 var _is_debug: bool
 var _song: SongObject

volume_slider.gd

@@ -1,19 +1,24 @@
 class_name VolumeSlider
 extends HSlider
+## A slider that sets the volume of an audio bus.
 
-@export
-var audio_bus_name := "music"
+## The audio bus whose volume the slider sets.
 
-@onready
-var _bus: int 
+@export var audio_bus_name: String = "music"
 
-func _ready():
+var _bus: int
+
+
+func _ready() -> void:
 	_bus = AudioServer.get_bus_index(audio_bus_name)
 	value_changed.connect(_on_value_changed)
 	value = db_to_linear(AudioServer.get_bus_volume_db(_bus))
 
-func _on_value_changed(changed_value: float) -> void:
-	AudioServer.set_bus_volume_db(_bus, linear_to_db(changed_value))
 
+## Sets the bus volume to [param changed_value], from 0 (silent) to 1 (full).
 func change_volume(changed_value: float) -> void:
 	AudioServer.set_bus_volume_db(_bus, linear_to_db(changed_value))
+
+
+func _on_value_changed(changed_value: float) -> void:
+	AudioServer.set_bus_volume_db(_bus, linear_to_db(changed_value))

winner_popup.gd

@@ -1,17 +1,11 @@
 class_name WinnerPopup
 extends BasePopup
+## Shows who won, with their character, and where the other players placed.
 
-@onready
-var winner_panel: Panel = %WinnerPanel
-
-@onready
-var winner_picture: TextureRect = %WinnerPicture
-
-@onready
-var winner_label: Label = %WinnerLabel
-
-@onready
-var players_list: VBoxContainer = %PlayersList
+@onready var winner_panel: Panel = %WinnerPanel
+@onready var winner_picture: TextureRect = %WinnerPicture
+@onready var winner_label: Label = %WinnerLabel
+@onready var players_list: VBoxContainer = %PlayersList
 
 
 func _ready() -> void:
@@ -54,6 +48,3 @@ func show_winner(winner: PlayerObject) -> void:
 		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 		players_list.add_child(label)
 		placing += 1
-
-
-