Very impressive stealth mechanics, this game had some strong Thief/Deus Ex vibes to me. The procedural room generation system was both a blessing and a curse. I was very intrigued by the variety of rooms and how they connect with each other organically, but more than once I found myself stuck because all of the doors were locked and I had no keys (one time it happened in the starting room - there definitely should have been some safeguards to prevent that). Very impressive rooms roster though! I liked the level design work and the sheer variety of interesting ideas. Each room has its own gimmick; there are some secret doors, a lot of stuff to explore, and interact with.
Overall, it is very impressive how this whole thing holds together, considering the sheer number of different systems you've implemented. It is rare to see such a system-heavy horror game, which also manages to be a competent survival game and pull off an interesting story, so this is quite an achievement!