I really liked the music. It's simple but you've got a finished game which plays without any bugs (as far as I can tell), there's games made by professionals which can't even achieve that.
To improve on what you already have, have pauses at the start and when someone scores so that they can prepare.
It could do with some polish and expansion on the mechanics to make the game your own, but take it slow, one step at a time.
So far, it is a solid start, keep it up.