Arrow keys to move, space to throw a ninja star (if you have any), if you touch the right edge of the screen you will go to the next level. The grey words at the top will give you more information. Since the skeleton's eyes are black, there is a 0.34% chance that if you are holding there up arrow and the left/right arrow you will wall jump off the skeleton. Also on the boss level you can hold the space key to shoot a ninja star and there is a 25% chance that if you hold the up arrow you will jump in the air. Press r to restart a level.
https://scratch.mit.edu/users/Will_Wam/ inspired me to add water. https://scratch.mit.edu/users/Will_Wam/ also drew the ninja stars. Thank you for the 17 views! sequel: https://scratch.mit.edu/projects/306871177/