The Flis are a strange set of cells that really have no use within their own universe. They have short lives and live their lives collecting remnants of deceased Flis.
Their average life expectancy is only 62 seconds, they really do live for such a long time and live such dramatic lives. They also like to latch onto whatever they can to keep their momentum going, they'd die otherwise.
See if you can help the Flis with their lives, keeping them alive for longer than 10 seconds is as good a job as any.
Mouse: Guide the Flis with the mouse.
Mouse Left Button Down: Shrink the Flis.