Can I have feedback on the first 3 levels of my first actual WAD

[Crate-Of-Loot]

I'm new to Doom mapping & I wanted feedback on the first 3 levels of my wad. The wad is for Doom II was made in Doom in Hexen format, and I've tested it on GZDoom. Any criticism is welcome.

 

(This is technically my 2nd wad, but the first was me finding out how Doom Builder worked)

 

Link: https://drive.google.com/file/d/18j07LCaPK3LyNkSBZGJoJ6lKcwKTfBYC/view?usp=sharing