/vr/ - Retro Games

Anyone here wanna take a look at my map and give me some feedback?
It's my first serious attempt at making a map so I'd like to know what I could do better
https://www.dropbox.com/s/7i0alron6p2d427/CLOSETV1.wad?dl=0
Working titles: "Durex Waste Disposal" or "Trapped in the Closet"

+Things I already want to change+
1 - Doorway doesn't open high enough to enter without crouching
2 - Needs actual content besides just monsters and a switch
3 - Currently considering adding more content after the red key door, exit is just for current version
4 - Many of the doors don't have proper side textures or if they do they move with the door