An Android file checksum calculator that actually works

Ninjako is an arcade, endless and challenging game.
Be the ninja you wish to be, overcome the obstacles and collect gold , use power-ups to help Ninjako move easily and quickly.
Play in single mode ,get the highest score with unlimited usage of power-ups to have your name on game leader-board!.
Challenge other players , get the highest score with limited usage of power-ups and be 1# on online mode leader-board!