Congrats on the new map. I love your selection of Knave textures and lighting was another standout. Feels evil and Quake-y.
Some thoughts in no particular order:
*combat was fun and hectic but maybe could use a few more trigger_counter setups to pace the monster spawning a bit better. Right now it seems a bit random as to when they spawn in. You may want that I dunno.
*Your trigger_monsterjumps are awesome good game on that!
*I really liked the lava jumping bit. Not too hard but just nerve wracking enough.
*I like dark and contrasty maps but others might say this map is too dark. If you get more than 2 or 3 comments on that use the gamma worldspawn key in ericw's tools to increase the gamma of your map slightly. (I just did this with a map on mine.)
*slow down the door opening to the exit to make it more obvious to the player that something has happened.
*there's a "post" or pillar near the doors in one area I got stuck on. it's dark and almost feels like a mistake. Maybe put a torch on it or thing about removing it.
Link to my demos:
https://www.dropbox.com/s/jumwloxzzqozvjc/dmptrk_box_demos.zip?dl=0
I always play on normal.