I must admit, this got me a bit confused. I really like the idea of having the ball following the beats, but... It doesn't seem to? Maybe because it accentuate beats that are not particularly noticeable in the song?
I really don't know. Because otherwise, the game is nice! Well, catching the ball when it goes really fast sometimes impossible. But outside of those moments, it works like a pretty great rhythm game. Plus the visuals are simple, but provide good feedbacks. Well done!