Very creative and the balloon animations are really well done! I love the use of two different stages that control and play very differently! And the way how you change the speed of the balloon and the management of the inflation is very smart.
I discovered way too late that you can use the microphone to inflate the balloon, since the A/B buttons do the same. Overall I find it very awkward to control though. The tilting is very weak and the microphone is to the side so you can't easily look at the screen while playing. I also completely misunderstood the goal of the blocking stage. I thought I still had to make the balloon go as high as possible :D