private void OnSceneFinishedLoading(Scene scene, LoadSceneMode mode)
    {
        // switch UI
        MainMenuUI.SetActive(false);
        SceneUI.SetActive(true);

        InitializeWorld();

        _orbitCamera = FindObjectOfType <OrbitCamera>();
        _orbitCamera.Initialize(WorldApi);

        // start new scene in camera mode
        ChangeMode((int)GameMode.Camera);
    }