Alright, I'm not posting any more bugs in my other post, because its getting WAAAAY too big!
If you hold the retry button, and minimize the game's window, it will keep acting as if your holding it even when you weren't (on the map screen anyway). Boosted the 1000 deaths's achievement in about a minute with this, (its easy enough anyway but still)
Just now realized you can use the arm on the homing missiles, and when you do, ALL the missile guys in the room die instantly? It also doesn't necessarily change the missiles direction.
Seriously why am I the only one finding this stuff?