Nice chunky oldschool/id-style map.
I could've used a medkit somewhere around the starting area (maybe there was supposed to be one? - two health items fall out of the level; tip: use developer 1
to identify such cases). The armor secret is a bit too well hidden, I think. Better if there had been a low light inside the opening that's only visible from up the ledge. Besides, the secret armor is quite close to the one in the open; would have been better if it was reachable earlier, e.g. from the starting room.
The steps to get out of the slime pools could have been more visible, too.
By the way, I recommend using an all-lowercase filename for the next map. Otherwise it's always a bit of a hassle on a case-sensitive OS.