void Awake()
 {
     if (retryButton == null)
     {
         Debug.Log("retryButton == null");
     }
     if (detailButton == null)
     {
         Debug.Log("detailButton == null");
     }
     if (detailPanel == null)
     {
         Debug.Log("detailPanel == null");
     }
     if (pauseButton == null)
     {
         Debug.Log("pauseButton == null");
     }
     if (remainingWordlist == null)
     {
         Debug.Log("remainingWOrdlist == null");
     }
     if (timer == null)
     {
         Debug.Log("timer == null");
     }
     tileManager    = TileManager.GetInstance();
     wordChecker    = WordChecker.GetInstance();
     linkController = LinkController.GetInstance();
 }