I love the art, post-processing, and lighting. Really effective at giving the game a good, moody feeling.
Definitely difficult to keep track of where you're at and where you've already been, but I'm sort of conflicted on how I feel about that. On one hand, it can be frustrating. But on the other hand, I feel like it almost adds to the whole game's vibe in a weird way. I don't know.
Overall though, this game is super cool and atmospheric. Great work!