I haven't tried it, but from what I see on the screenshots, it looks quite interesting. However, by judging from the last screenshot, you should add some variety of textures on that sector unless you are trying to do some cave or something. You should also be aware of texture alignment (I am telling you this as a regular mapper who learned from his mistakes, even if I don't release my maps to the public).
And this doesn't have to do with the mod/map, but I find it amazing how people are still making maps for Doom, a 20-ish year old game, and the fact that there are still active Doom communities (like Doomworld, ZDoom.org, etc.) which still makes modifications for the game is even more amazing.
I might come back with actual feedback on the map.