I think this map is a good early version, but it does need some improvements.
Many areas of this map are exactly like each other (like the two floors of the towers, and the two "wings" off to the side) making it hard to tell where exactly in the map you are. This also makes the map less varied. I think you should change the weapons somewhat; e.g. I suggest adding Quick Boomerang.
My biggest problem with the stage however, are the stairs between each floor. First off, they're jump stairs. They're a hassle to climb and fight on, I suggest replacing them with ladders. My second problem:
(http://xhatahx.weebly.com/uploads/6/0/1/8/6018829/screenshot-doom-20201115-110521_orig.png)
From the second floor, the stairs look like a sheer drop. Maybe you can put up a wall on the far side so you can tell there's a floor there.
In general it has a lot of promise. Keep up the good work!