void Update()
 {
     ScoreText.text     = "Score: " + score;
     highScoreText.text = highscore.ToString();
     if (score > highscore)
     {
         highscore = score;
         HighestScoreJson.SaveHighestScore(highscore);
     }
 }
 void Start()
 {
     highscore = HighestScoreJson.GetHighestScore().highestScore;
 }