There was some lovely stuff here! There's a high level of polish in this game, and it felt like polish with a purpose. The game felt like a unified experience with a definite sense of atmosphere: I had a clear idea of when, where, and possibly who I was. The environmental storytelling, the puzzles, and the hints of the events that led to the game's story gave the game a surprising amount of tension for its length.
I agree with what some of the others have said, in that it would be great to see more! It feels like you could get a lot of story, a lot of atmosphere and a lot of HORROR out of a longer version, if you keep working on this after the jam. Well done!