The game puts you in control of an inflatable ball that can be moved about various maze-like levels by way of touch-directed bursts of air. The goal is to collect all of the yellow orbs strewn about each of the game's more than 50 pseudo-3D levels in order to exit each maze. But there's more in each level than just yellow orbs. You must negotiate a wide variety of obstacles and enemies in order to make your way through each level. There are, among other things, moving traps, doors to unlock, weapons to collect and use, spikes to avoid, and end-bosses to contend with. A steel ball power-up renders your ball impervious to damage and able to plow through certain walls for a short period. Some pathways require you to deflate your ball in order to fit through, and then it's fingers-crossed that an air pump is just around the corner, because when you're out of air, you're out of luck. And those bursts of air that move you hither and yon - they're not freebies; each burst lowers your air level just a bit.