Honestly, best game I've played in the jam so far. So well done.
Firstly, I need to tell you that when I start the game the window appear weirdly in a corner, I press F for full screen and then everything work well.
And then I got addicted to the game, is so much fun to play. Suprisingly difficult, but I enjoy go to each room and shoot down enemies as fast as I could. I think the rate at which the rooms lost power is a bit too fast, but I'm not sure.
It was so satisfying to get ncreased fire rate, I almost achieve machine gun speed.
One thing I would suggest is to don't show where the exit of the room is, I enjoy the preview at the beginning of each room but knowing where the exit is make me want to go straight there and don't explore as much.
I get to the 4th floor, and I enjoy a lot your game. you get 5 stars from me.
:D