Wow.
This was very well done! I can't believe it's something you just made as you went along. I know a lot of people are complaining about the puzzles being a bit confusing, but I think that's just because they're so enthrawled and don't know how to continue. I had to use the walkthrough myself in places.
Also, people are saying that this is slow because there aren't enough monsters and crap like that. I think it's much creepier that things aren't jumping out at every room. The suspense is phenomenal.