Loved the "Doomness" of the level. I found myslef exploring every last corner of it and I love that.
Just two things, in the roof of a building there are 3 canister things, careful with those, as the player can get stuck between them.
Also, maybe tone down the fall damage a lil bit, it feels unfair to take damage after falling from a 1 story building in this kind of games. But you know, this is only a suggestion.