private void OnCollisionEnter(Collision collision)
 {
     if (collision.transform == car.transform && !gameStart)
     {
         transform.position -= Vector3.back * -1;
     }
     else if (collision.transform == car.transform && gameStart && !controls.enabled)
     {
         GameWin();
         car.GameWin();
     }
     else if (collision.transform == boxPrefab.transform)
     {
         timerLength += 10;
     }
     else
     {
         inAir = false;
     }
 }