It was pretty fun, though personally not for me.
I liked the sound and visual, simple but effective.
I think a short tutorial would be useful, it took a while before I understood my goal.
Also, I think a way to acces the options menu without leaving the level would be good. I also think a button to reset the ball would be a good additon, so you don't have to wait for the ball to finish moving when you already know you failed.
I noticed in one level that the ball movements became a bit unpredictable. After the ball hit a yellow cube, it followed different paths each reset. Not sure if that's intentional or not.