public void ClearStage()
{
cleared = true;
// enable clear panel
clearPanel.SetActive(true);
// set text for score and time displays
GameObject.Find("ClearTime").GetComponent <Text>().text = "Time Left = " + TimeTracker.GetTimeText(time);
GameObject.Find("ClearScore").GetComponent <Text>().text = "Score = " + ScoreController.GetScoreText(score);
}