add tween plugin and refactoring UI

core/game_menu/option_menu.gd

@@ -1,16 +1,31 @@
 extends Control
 
-@onready var play_button: Control = $%PlayButton
-@onready var resume_button: Control = $%ResumeButton
+@onready var play_button: Button = $%PlayButton
+@onready var resume_button: Button = $%ResumeButton
+@onready var settings_button: Button = $%SettingsButton
+@onready var save_button: Button = $%SaveButton
+@onready var quit_button: Button = $%QuitButton
+@onready var show_container_tween: ContainerTween = $%ShowContainerTween
+@onready var hide_container_tween: ContainerTween = $%HideContainerTween
 
+func _ready() -> void:
+	play_button.pressed.connect(_on_play_button_pressed)
+	settings_button.pressed.connect(_on_settings_button_pressed)
+	save_button.pressed.connect(_on_save_button_pressed)
+	quit_button.pressed.connect(_on_quit_button_pressed)
 
-func _on_resume_button_on_button_pressed() -> void:
-	GameState.resume_game()
+func _on_play_button_pressed() -> void:
+	SceneManager.change_scene(SceneConfig.SceneName.GAME)
 
-
-func _on_save_button_on_button_pressed() -> void:
+func _on_save_button_pressed() -> void:
 	GameState.save_game()
 
 
-func _on_quit_button_on_button_pressed() -> void:
+func _on_quit_button_pressed() -> void:
 	GameState.quit_game()
+
+func _on_settings_button_pressed() -> void:
+	if $%SettingsMenu.visible:
+		hide_container_tween.start_tween()
+	else:
+		show_container_tween.start_tween()