Pretty cool project: Controls were good. Enemies were a manageable threat, but there was no variance in behaviors, so it was pretty predictable. Powerups helped change the game somewhat, but it was not intuitive when they would expire, or when things reset (like HP on each level). Level design was fine. Interactions were intuitive (buttons/doors/powerups). Clever final level, I totally went back to open the last door before finishing the level, ha! The graphics were good, the style was pretty consistent (aside from the strangely small pixel-sized bullets?). Only glitch I noticed was enemies pathing around a powerup instead of moving through it; wouldn't have been such a problem except that it created a chokepoint in a doorway making all of the enemies in that room dreadfully easy to take out.
Congrats guys!