I'm new to agdg so most of this flew over my head!
I'm astonished at how much is in this demo, though a lot of it definitely feels like it's throwing darts at a board to see what sticks, which is fine!
The strength of this game will come with tailored level design and tightening up the responsiveness and feedback of the weapons.
Keep at it, there's a lot of great ideas here that just need more love.