refactor structure

scenes/ui/MainMenu.gd

@@ -0,0 +1,21 @@
+extends Control
+
+signal open_settings
+
+func _ready():
+	print("MainMenu ready")
+
+func _on_new_game_button_pressed():
+	AudioManager.play_ui_click()
+	print("New Game pressed")
+	GameManager.start_new_game()
+
+func _on_settings_button_pressed():
+	AudioManager.play_ui_click()
+	print("Settings pressed")
+	open_settings.emit()
+
+func _on_exit_button_pressed():
+	AudioManager.play_ui_click()
+	print("Exit pressed")
+	get_tree().quit()