I do like the concept, but...
I wish that there would be difficulties, and multipliers and cool things like that. Even changing backgrounds every few points, or some odd multiplier characters like an asterisk or something would be cool.
The graphics i.e. the background could be greatly improved with dynamics and motion. Also i found a problem with the sound of the balloons, sometimes they popped and sometimes they didn't make the pop sound. The best thing would be to make levels and different backgrounds.