Awesome game! This is really polished for the time constraints.
Feedback: 1) A mouse aim speed option would be nice. It seemed low on the desktop version and high on the web version. I could probably mess with my laptop settings to fix that though. 2) Having some subtle music would really add to the atmosphere, even if the music only played in certain areas. Or, if no music, maybe more variety with the ambient sounds. 3) The enemies could use some sort of 'damage' animation. Right now, you can't tell if you're hurting them until they're dead.
Very solid entry :) Thanks for sharing.