Nice! I loved the visuals and you had plenty of queues. I won't go on about the camera, GUI box, HVAC to exit sound and whatnot as it seems you have already addressed that. I was really cool! I just wish there was more to it! As for music, honestly, I think this game could pull off a 'creepy ambience' vibe with a couple more sounds. Could be cool to have some flickering effects for the walls (with sound) as well as distant 'clangs' and hits or something.
It has a very unsettling vibe which I'm a huge fan of and I really enjoy! Great work! :D