Made it to the end on my second run, the first time I was a bit confused and didn't realize I had spooky-vision bound to E!
I feel like you nailed the aesthetics, I appreciated the nicely degraded textures and draw distance, plus the first person weapons were nice with cool reload animations. Oh and the soundtrack was very nice too.
If I had to pick one thing that could be improved I think it'd just be the UI elements for interacting with things. There were a number of occasions where I was unable to pick up a weapon or redeem an objective for several tries. Not sure what was causing the bug, but these things happen in a jam! If you also did a nice job with the lower screen UI, so seeing that in the 'press F to do x' text too would have been nice.
Overall really nice work :)