Alone in a world of circles and squares, Restibo seeks out the seven keys
needed to unlock the dark planet core. Scattered amongst the hanging
blocks are Voids, floating circles that nullify gravity and contain items like
feathers, springs, spikes, claws, and bubbles. These items help Restibo
advance through the layers of the atmosphere, flinging from one block to
the next to reach larger and more intricate Voids.