I really like the graphics and general vibe! Good title screen and ominous bass notes to set the tone, as well as good background noise and effects every now and then.
I kept dying before opening the first door for reasons I didn't quite get, but if I moved fast I got past that part.
Do you need to find the map to be able to use it? M didn't work for me. I got to the Motion Tracker and died a few times there - the escaping gameplay there seemed pretty interesting actually and reminded me of Alien, but after dying a few times and not having a map it got a bit tiresome to go back to there each time to try again.