void OnGUI()
{
//show on the left top how many lives left
if (lives > 0 || playerObject != null)
{
GUI.Label(new Rect(10, 60, 40, 50), " lives:" + lives);
}
//if there is no lives leave and player is die show gameover
else
{
GUI.Label(new Rect(Screen.width/2,Screen.height/2-25, 100, 50), " Game Over ");
}
}