Although its just a single screenshot, I think you make a really good job in creating a dense and creepy athmosphere by the lighting of the level. Not because it is just simply dark, but because the space between the light in the foreground and the door in the background is almost completely in darkness. And I guess that is the way player has to take. I would love to see it in motion with flickering lights.

And you definitely need an option for gamma correction in the final project I could not see anything at first.