This was an Amazon App Store Giveaway
Helium Boy is a whimsical 3D platformer where the objective is to move about the "board" with the help of your helium balloons. if you "jerk" the balloons you go up and if you don't do anything you fall (gently), and you can gently glide left right, forward back a bit. The idea is to grab all the goodies while avoiding the nasties.
Controls are a little iffy, as it takes a bit of time to learn how far you glide, and there are nasties, and you CAN fall into bad places. Still, it is unique and interesting take on the platform game genre.