This is an interesting concept, but the gameplay ultimately ends up being too difficult. I did not feel like I had enough control over the throwing mechanic, and got a bit frustrated early on.
I also had a hard time deselecting only the balls that I wanted. It seems like sometimes if I wanted to keep the first ball i got, and drop one of the ones on top of it, that all of the balls would be dropped.
Visually very cute though!