Press the flag to start. Use W, A, S, D or the arrow keys to move around. At level 10 approach the ball from the top to activate the dialogue. To wall jump press the left/right key and the up key to perform it. Remember to press "1" and "9" at a specific level. 20 minimum jumps
Credits: Art - Friday Sketches (aka Afei) [YouTube] The actual coding + everything else - Me Updates: 1.0 Added double Jump feature