Great level, fairly challenging but it is ok. The music and story put you in the right athmosphere. The puzzle at the end took me some time to figure out, but other than that, I hadn't any problems. The deaths with a cutscene would be better, if they lead to a "death room" which takes the part to send you back to the last safe point. I found one little wallswim if you go up on the right side of the hole in the room with the red key.