Fairly spooky game, the uncertainty of monster behavior after you saw a glimpse, and the claustrophobic environment amplifies that effect. I felt pretty tense trying to get out.
Some issues I encountered was a small bug where after the monster appears, I picked up a key and the "investigate what you saw" text appears again, with the monster scene where he appears briefly in the beginning replaying. Bug may be related to how I've already died and was retrying. The monster also gets stuck at doors which can trap you or let you escape without worry.
It's quite forgivable for small bugs to appear in jams though, so despite this I thought the game was still one of the spookier ones I've played.