I have removed dying from hitting your head here is the rest of Will_Wam's instructions. Use the arrow keys or WASD to move and flip around in the air! > Jump around taking out enemies with your katana! > Don't let them shoot you with their throwing knives! > Press Space to throw 2 shurikens! > See how many ninjas you can defeat before they defeat you!
i only removed a bit of code so full credit to Will_Wam