This is just a short platformer. Use arrow keys to move around and the game will tell you the other controls. When fighting the enemy ninja, try not to stay next to it for too long because there's a glitch where you might fall through the ground and die. Also when you learn your first ninjitsu skill, a training dummy is supposed to spawn. When I play it often doesn't spawn even after rearranging the code so please comment to tell me if it spawns or not because it could just be my computer.
I made it in a few hours and it isn't very complicated. A 2nd might come if this is good enough. TIP FOR ENEMY: hit jump, hit jump...