Turn Left, Turn Left, Turn Right, Turn Right, Up, Down, Left, Right (It should display "Invincible Mode" after you've type it. Please note the Turn Left key isnt the same as the Move Left key. If you can't make it working, try config the Turn Left key to "Q" and Turn Right key to "E". Then type Q,Q,E,E,Up,Down,Left,Right should be okay)