1,2,3, Shuriken fights in the digit arena!
Use the shurikens outside, to eliminate the shurikens in the arena. Don't let the arena be filled!
Live longer, kill more and get the highscore!

Instructions

Drag the shurikan outside to the empty tatami on the board, attack the shurikens nearby! The damage = digit!
Cross-type attacks the adjacent / X-type attacks the corners.
Eliminate the shurikens on the board. If the board is filled ,game over!