The green boss I was confused where it was at all times. A little frustrating that you can either attack or run but not both while the bosses can have three attacks at the same time. Awesome effects.
In hindsight, making the bosses out of particles wasn't a good idea, since so are the bullets... the "not moving" thing was a balancing thing, but then I buffed all the bosses and didn't think to remove that, heh.
Thanks for playing the game! The effects are all that I have, really.