// Update is called once per frame
 void Update()
 {
     if (is_started)
     {
         cnt_game -= Time.deltaTime;
     }
     TimeText.text = GetTimeString();
     if (cnt_game <= 0f)
     {
         CountText.text = "Time's Up!";
         aud.Play();
         BGMManager.SendMessage("StopBGM");
         StaticVars.LocalStudentScore = MainScoreController.GetScore1P();
         StaticVars.LocalAdminScore   = MainScoreController.GetScore2P();
         StartCoroutine(StartGoToRankings());
         Time.timeScale = 0f;
     }
 }