A good attempt, but needs improvement.
I was skeptical, but then I tried it and said "This is actually a cool idea!". The graphics were poor and could use some work, especially the backgrounds, but the gameplay has a lot of promise.
Simple yet challenging, the perfect mix. I also liked the option to turn off the annoying music; any game that does that gets a plus in my book!
I think a sequel is in store. Add some cooler graphics, improve some of the bugs (e.g, popping all the balloons automatically allows you to win, some balloons don't drift away when they're supposed to, and some characters can go off the sides of the screen.), and maybe make the characters smaller so it'll be more challenging. All in all, this is more like an Alpha build of a great game, than a finished product. I'd like to see the idea carried on though.