This game is really charming despite its jankiness. I really like all the different gameplay styles you added and I like the storytelling and the way you messed around with the game UI. That bit at the end where you reused the level from the beginning is great and I liked that.
The game is a bit frustrating though and it's easy to mess up and be stuck somewhere. I also think the gun should've allowed you to hold down the mouse button rather than having to spam it. Enemies needed feedback when hit to indicate that you're doing damage too.