The idea behind the game sounds pretty unique, especially the rock-torch-etc style of gameplay. I really like the visual effect/lighting although between the few colors and how easily your weapons clipped through the walls it was a bit tricky to see them at times. The ambience from the audio is really good though and I think you nailed the vibe that your description seems to be going for. Not much to critique right now but I do think the concept is very promising and could make for quite a cool game.