There are no menus or guidelines; the game begins immediately. The game world, which is viewed from a top-down perspective, consists of two-dimensional planes stacked vertically upon each other. A blurred version of the layer below appears in the background of each plane. Planes contain organisms of varying sizes; the player's creature automatically attempts to consume them when they are nearby. The majority of these creatures are non-confrontational and are composed of cells that increase the number of segments in the player's creature when eaten. All planes, except for the highest and lowest, contain two specially colored organisms that move the player's creature up or down one plane when touched.

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