It is a game that surrounds many circle with one-stroke. Make one-stroke that the lines do not cross, through all the relay points on the panel. It is necessary to enclose all ○ (island) mark and exclude all × (shark) mark. If succeed in writing with one-stroke, finished and proceed to the next stage. The level goes up depending on the speed of clearing. As the level goes up, the number of circle and X marks increases and the stage becomes complicated. Clear all 10 stages, the total score will be registered on the leaderboard of the game center.