Added a function to go back to main menu but haven't made it usable in game

Assets/scripts/game_window.gd

@@ -3,7 +3,18 @@ extends Node
 @export var game_base:PackedScene
 @export var main_menu:PackedScene
 
-func _on_main_menu_start_game():
+func StartGame():
 	var game = game_base.instantiate()
 	remove_child($"Main Menu")
 	self.add_child(game)
+	
+func ReturnToMenu():
+	var menu = main_menu.instantiate()
+	remove_child($"Game")
+	self.add_child(menu)
+
+func _on_main_menu_start_game():
+	StartGame() 
+
+func _on_return_main_menu():
+	ReturnToMenu()