It is a game that surrounds many circle with a single stroke.
Make a single stroke that the lines do not cross, through all the relay points on the panel.
It is necessary to enclose all circle (island) mark and exclude X (shark) mark.
"Shark" is "Same" in Japanese, and one "stroke" is one "Fude" in Japanese.
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.