I really like the design and the style of the enemies, and overall the game looks nice even (if the environment are a bit plain). There are some really interesting ideas in there (microwave as a weapon is one of my favorite). The biggest issue at the moment for me is that there's no breathing room in the action - most of the time (or rather all of the time) I have no idea what I'm picking up since I'm constantly pressured by either enemies or the ceiling closing in and having to go to the next level.
The weapon sprites also feel way to close to the center considering the angle they're drawn at.