Thanks for the release, I had a good time running through it.
A couple of simple notes I would like to offer, just small things that would have made it more fun for me as a player:
Deaf or Ambush Player monsters and sound blocking linedefs could flesh the levels out better. A lot of fights boiled down to shooting down hallways while every monster in the area came tunneling towards me. Making some deaf or blocking sound to areas would force more caution and spread combat more thoroughly through the levels.
I also found the wad to be very, very easy, mostly due to tons of ammo and health and few mid to high tier monsters. All the low tier monsters drop easily and most give ammo. Replacing a lot of Zombiemen with Revs and Mancs could clear this up pretty easily and add a lot of challenge.
More varied heights would've been nice as well. Overall the architecture was nice, it just could've used a little bit more variance in the form of stairs and balconies and such.
Those are my personal thoughts, overall I had a good time and could see you have a solid grasp of how to use different sector types and vary the gameplay in general. I especially enjoyed the lava room with the hidden switches to open the exit, sliding back and forth across the pits to find the switches was fun, and the level with all the Archies and the false exits was cool as well, though I do prefer to 100% a map if possible (maybe there was a way to kill 'em all, but I didn't see it). Maps were a good length as well.
Thanks again for the release, keep it up, I'd like to play more in the future.