Overall, super cool game! The combat was fresh and felt super good, the physics on the ball feels just right where it can be controlled with skill but can cause problems if you are reckless. That's a very hard line to walk but you did it perfectly!
If you wanted to improve, I suggest fixing the shop. It is nice to have a large selection of items, but stepping on and off, waiting for the right item to appear can be kinda tedious. One time it gave me three of the same item to buy.
Still, super fun and I had a good time!