Liked this a lot! Managed beat the 4 levels without a single star... hah
There are some things that feel a little weird, mostly sometimes the ball is not cornered so I would expect it to move, but it moves the character instead. I still don't have a complete intuition over when the ball will move vs when the character will move.
I also had the issues with clipping through walls sometimes, but you had a pretty generous checkpoint / respawn system that still let me make it through.
It was pretty confusing in the beginning. I didn't understand that I could use the ball to move the character at first. A little intro cutscene or something would go a long way I think.