add train control game

scripts/scene_switcher.gd

@@ -0,0 +1,19 @@
+extends Node
+
+var current_scene = null
+
+func _ready() -> void:
+	var root = get_tree().root
+	current_scene = root.get_child(root.get_child_count() - 1)
+	
+
+func switch_scene(res_path):
+	call_deferred("_deferred_switch_scene", res_path)
+
+
+func _deferred_switch_scene(res_path):
+	current_scene.free()
+	var scene = load(res_path)
+	current_scene = scene.instantiate()
+	get_tree().root.add_child(current_scene)
+	get_tree().current_scene = current_scene