// Use this for initialization
    void Awake()
    {
        isOpen = true;
        menu_button.GetComponent <Button>().onClick.AddListener(() => { OpenCloseMenu(menu_panel, ref isOpen); });
        SceneLink scene = jSONLoader.GetSceneLink(SceneManager.GetActiveScene().name);

        buttons[CONTINUE_BUTTON_INDEX].GetComponent <Button>().onClick.AddListener(() => OpenCloseMenu(menu_panel, ref isOpen));
        buttons[AR_BUTTON_INDEX].GetComponent <Button>().onClick.AddListener(() => LoadScene.LoadSceneByName(scene.ARsceneLink));
        buttons[VR_BUTTON_INDEX].GetComponent <Button>().onClick.AddListener(() => LoadScene.LoadSceneByName(scene.VRsceneLink));
        buttons[EXIT_BUTTON_INDEX].GetComponent <Button>().onClick.AddListener(() => LoadScene.LoadSceneByName(prevScene));
    }