Press [Up], A, [Right], A, [Down], A, [Left], A, [Up], S, D
during game play.
Press Z, C, Z, C, [Up], [Down], [Up], [Down], [Left], [Right] at
the main menu. Game play will be faster in this mode.
Do all the following codes at the difficulty menu screen. Depends
on how you config the keyboard. Press [f6] key for your current
keyboard config. (eg. Zoom1 is default to "A" key)
Up, Zoom1, Right, Zoom2, Down, Zoom3, Left, Zoom2, Up, Zoom1
Up, Up, Down, Down, Left, Right, Left, Right, Zoom1, Zoom2, Zoom3
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