public void UpdateFallingPieces()
{
Queue <string> keysToRemove = new Queue <string>();
foreach (string key in _fallingPieces.Keys)
{
FallingPiece p = _fallingPieces[key];
p.UpdatePiece();
if (p.VerticalOffset == 0)
{
keysToRemove.Enqueue(key);
}
}
while (keysToRemove.Count > 0)
{
_fallingPieces.Remove(keysToRemove.Dequeue());
}
}
