Nice game! I found myself putting my finger directly into the paddle many times. Instead of the message "Push here to play" you could create a more obvious UI

Nice game! I found myself putting my finger directly into the paddle many times. Instead of the message "Push here to play" you could create a more obvious UI element where one should press (something like the grip part of a slider). Maybe even make the grip glow when you push it for funs :-).