I'm sure others have touched on the weird interactions between enemies and eitehr you or them touching walls. I think I had a weird interaction with the charm ball getting destroyed by the fire one and it freezing the enemies as well.
Otherwise I LOVE this concept so much, a bullet hell of your own making where you are constantly dealing with your own chaos. I think the fire ball might kind of not work with the rest of the game design but otherwise the gameplay loop is super fun as you get progressively more and more stressed about where you fire your next ball and the chaos of how you'll dodge it this time while leading enemies into them.