Fight your way across the level, and find the 39 fruits :) [Arrows or WASD] - Move [Space or H] - Attack [M] - Music On / Off. [P] - Pause On / Off [T] - Throw (Shurikens/Pike once picked up) Hold down to crouch, Tap down to drop through platforms. Crouching for a second provides you with power for an extra long jumps or kick. [K] - Kill self
I set the player's punch radius to 9 with about 70,000 9s behind it, which makes it's punch and kick's damage and the distance very far. One punch or kick can take one 10 or more enemy ninjas. I also made everything smaller.