Intended as a first level in a megawad I'm thinking about, this level's short and tough. The way I figure it, put the hard stuff up first, weed out the wusses. Not like all those movies and cartoons with Good vs. Evil where the villain puts the heroes through progressively harder situations. ;)
Works great for Deathmatch, I'd say better than Co-op since in the tight halls you'll end up shooting your partner a lot. :-p