(Possible spoilers)

• The main menu text is difficult to read. I know it can be toggled, but probably you shouldn't have a setting that everyone will want to turn off. The in-game text is not as bad because the characters are wider.
• It looks like you have some signal connections with missing handlers https://paste.debian.net/1090666/
• After interacting with something I can't immediately interact again, I have to walk away and walk back
• After using the yellow key and blue key, and obtaining the second yellow key, when I return to the main hall I can go out of bounds using one of the doors, if I travel through it enough times. It lets me walk in the black space. I'm guessing it's not intended because the door animation doesn't match up. I got stuck at this point. 

I don't play a lot of horror games, but it seems like the broken topology of the rooms could interact in interesting ways with other mechanics. I feel that maybe their psychological effect would be better if it wasn't so common in the early game, and instead scaled up with the tone of the story.