Air Balloon: Explore The Skies app for iPhone and iPad
The game lets you control your hot air balloon by adding and dropping weights to lower or lift your balloon. The goal is to navigate the balloon through the course to collect as many stars as possible and bring them to the end of the course. The more stars you have, the higher up your balloon will shoot! Be wary of the clouds carrying thunder though, because they will cause you to lose some of your stars!