Add audio bus configuration for various sound effects and update main scene reference

scripts/ui/main_menu.gd

@@ -0,0 +1,57 @@
+extends Node
+
+@export var main_menu_control: Control
+@export var new_game_button: Button
+@export var continue_button: Button
+@export var settings_button: Button
+@export var credits_button: Button
+@export var exit_button: Button
+@export var version_label: Label
+@export var settings_control: Control
+@export var credits_control: Control
+
+@onready var gm: GM = $"/root/GameManager"
+
+
+func _ready() -> void:
+	if new_game_button:
+		new_game_button.pressed.connect(_on_new_game_button_pressed)
+	if continue_button:
+		continue_button.pressed.connect(_on_continue_button_pressed)
+	if settings_button:
+		settings_button.pressed.connect(_on_settings_button_pressed)
+	if credits_button:
+		credits_button.pressed.connect(_on_credits_button_pressed)
+	if exit_button:
+		exit_button.pressed.connect(quit_game)
+	if version_label:
+		version_label.text = "v. " + ProjectSettings.get_setting("application/config/version")
+
+
+func _on_new_game_button_pressed() -> void:
+	if gm:
+		gm.start_new_game()
+	else:
+		printerr("GameManager not found. Cannot start new game.")
+
+
+func _on_continue_button_pressed() -> void:
+	if gm:
+		gm.continue_game()
+	else:
+		printerr("GameManager not found. Cannot continue game.")
+
+
+func quit_game() -> void:
+	if gm:
+		gm.quit_game()
+
+
+func _on_settings_button_pressed() -> void:
+	if settings_control:
+		UiManager.push_screen(settings_control)
+
+
+func _on_credits_button_pressed() -> void:
+	if credits_control:
+		UiManager.push_screen(credits_control)