Pretty fun game! The music can really make it intense, when trying to hit a specific shot in a little amount of time.
The umbrellas were a nice touch, adding a little bit more to the depth. I think there is a lot of room for other things that can affect your throws differently, maybe like a trampoline that can launch your balloon into a place you couldn't get to normally.
The place that shows you your targets might be a bit small, it was a little bit hard to tell what they all were.
Overall a nice little game! Very fun!