Use the [left] and [right] arrow keys for movement, press [space] to jump. Collect the air capsules to replenish your ever-decreasing supply while avoiding all the aliens that bounce around the planet. Jump into the vortex of each level to move onto the next.
Increase your score through combos by collecting capsules without hitting an enemy. Your combo score goes up with each consecutive capsule collected.
Analysis: Space Walker shows that a very simple concept paired with simple graphics can be made into an enjoyable and very pretty casual game experience. Variety in enemy type, enemy movement, and gravity for each level provides an increase in challenge, while a randomized color scheme provides something new to look forward to. Nothing earth-shattering or all that innovative here, just a well-designed package from tip to tail.