Hey, I really enjoyed your map. The pacing, amount of monsters, ammo, difficulty, etc, were all superb for me, and the variety in design between the different areas was very nice, I think it all comes together nicely. I ended up running out of ammo after clearing the massive lava room, but was able to progress by using the chainsaw and the two shotgun ammos placed just inside the door to the next area. Really nice work.
Just one thing though, I'm using gzDoom, not using any of the compatibility stuff in the settings, but I am using software rendering. In the images attached you can see the skybox wall textures are glitched for me in this entire area, however since the other players haven't complained, it could just be a gzDoom thing or just be on my end.