Atmospherically, this was one of my favorite games. The sprites, animations, and lighting were great. I love the moving night sky background when you're outside. That all combined with the beautiful, hypnotic looping music to create a really nice atmosphere.
I really wanted to finish the game, but I couldn't figure out how to get past the level that says you can "get back to hell". Every time I walked past the book cases I would die, and it didn't seem like there was anything I could do to avoid it. I'm not sure if this was a bug, or if I was just missing something. Also, the fact that you could push other characters made it feel like that was part of the puzzles, but it never seemed to help. I kept thinking that I should be able to push this other guy into the spikes or jump off his head. I think that could work as a mechanic, but if it wasn't designed to be part of the puzzles, it was a little confusing.
Overall, it was a beautiful game. Good work!