private void OnTriggerEnter2D(Collider2D collision)
{
if (collision.CompareTag("key"))
{
collision.SendMessage("PickUp", numOfKeys);
numOfKeys++;
ES3.Save <int>("numOfKeys", numOfKeys, "KeyNumber.es3");
MenuDisplay.AddKeys(numOfKeys);
HUD.AddKeys(numOfKeys);
}
}