public static ScreenInterface GetInstance()
 {
     return(_instance ?? (_instance = new ScreenInterface()));
 }
 private void ShowSettingsButtonClick()
 {
     ScreenInterface.GetInstance().Execute(ScreenType.Settings);
 }
 public void Dispose()
 {
     _instance = null;
 }
 private void StartGameButtonClick()
 {
     ScreenInterface.GetInstance().Execute(ScreenType.GameMenu);
 }