Alright, so here's what I liked:
-The Flemoids shooting slimeballs. The Bipedicus' three slime balls was amazing as well. Very nice job on that.
-The lighting; that one spiral lamp thing's blue light that moved up as the sprite's blue did, was awesome.
-The teleporters are amazing in GZDoom, too.
-I love the zorcher puffs. I love the slimeballs on the walls, too.
-Basically everything else converted over. The lights on the walls, dynamic lights, 3D Floor, transparent glass, and every other detail.
Problems I noticed:
-Several areas that should have been secrets, aren't secrets. Such as the credits room with the photos of Digital Cafe, and the redkey are in E1M3, where there is a maze-ish room with one side having a wall you can walk through to get an armor upgrade.
-The end switch at the end of E1M3 has a black line above it, which comes from the brown wall texture, but it doesn't line with the other walls. (This is right above it, so in the middle of the wall.)
-A hall of mirrors in E1M5. It's in the yellow key door, which leads to the blue key.
-The tables in E2M1 are missing their support, so they look like they're floating. That is of course unless they're attached from the wall or something.
-Some ceiling textures in E1M3 are lights, which doesn't make any sense. I'm not sure if you had a plan for this, but I thought I'd bring it to your attention.
-A lot of episode two's textures are just grey. I think you were gonna do something about that though.
-Zdoom has some special sector light that can for light only on the ceiling or the floor. This could be really nice looking for light panels on the ceiling, so you can lower the lighting around the sector without having the ceiling light up. (As in, perhaps you'd like for a light on the ceiling to light up an area, but have a more intense lighting directly under it, and slowly fade the light outward until it becomes room light. However, since the light is on the ceiling, it wouldn't make sense to also light the ceiling.) This can also make windows like a lot better, so that light comes in through the window, without touching the ceiling.
This was really nice though. I'll admit it's been a while since I played both TUCQ and Chex Quest, so it was nice to play again. You've been doing a fantastic job! Keep up the good work!