Very creative take on reversing(?) the bullet hell genre! Also very stylish.
I think the concept of sparing the shapes early on in order to have more power to destroy them later is super interesting, but a bit hard to act upon in the heat of the moment, so I mostly just focused on surviving, haha.
I noticed that the levels without obstacles in on the edges/corners could be cheesed a bit by dodging around the perimeter, which I think kited the enemies into the center. This made some levels a lot easier than others, sometimes later levels easier than earlier ones.
One small critique: The first few times I beat a level I thought I had lost. Something about the white flash and instant pause definitely triggered the “game over” reflex in my brain.
I did eventually have to give up, probably due to being too low-level to effectively evade the teal super-fast squares, but I threw myself at the level a few dozen times, so clearly I was having fun! Great work!