I liked playing your game. It has a simple yet good concept and it is challenging. Sometimes it's maybe a bit unfair because the balloons fly in such a way that you can't get past (or at least I can't :D) even on a very low score. But I really liked the highscore system.
This is a very nice game! I like the idea and especially your music. Maybe you could have polished the game over screen a bit more, but overall this is an excellent game.