This game has such interesting vibes! The music was on-point, kinda of a weird/out-of-place kinda thing, really good.
It is a tough game, but I enjoyed the exploration so much. The fact that it is procedurally generated was the cherry on top, I love this kind of stuff.
The bullet hell aspect of the game would work a bit better if your movement had no acceleration, but there were some ways around it (such as going to the very borders of the screen without actually leaving them, which seemed to work as a "safety spot")
One other thing that I found pretty interesting/unique was the actual transition to a different "scene" when exploring or fighting, like in JRPGs where you have a battle scene and a map scene.
Super unique and interesting overall. Great job!