I really did enjoy this game! Its main problem is that I don't think it can even be beaten. It's just you have to destroy the portals the enemies are coming through. It seems like that would have made a good game in itself. You didn't have to have the mirror theme. It is hard to believe this was made so quickly.
It really is well done in terms of graphics. The enemies are even pretty creative themselves. The sound with the gun wasn't too bad. It did get repetitive. I'm just glad to have played it.