I've opened all of the wads Eric (Reb) made that I have (I use Doom 95 with a Doom II wad). I've played UAC Labs tons of times. Haven't beaten it yet - it's not really meant to be beaten - but still I try. I guess it's sort of a penchant to beat a dead guy at his own game or something. Maybe I'm just stubborn. Anyway, I took some screenshots of the deathmatch levels. You can find them below, along with a link to some screenshots of UAC Labs so you can see what I'm talking about.