Unlock Martian:
At the main menu, press Right, Left, Right, Up, Down, Left, Right, Up, up.
Unlock Mars track:
Pause the game and press Left, Left, Right, Right, Left, Left, Right, Right, Down, Left, Right.
Widescreen mode:
Pause the game and press Left, Left, Left, Right, Right, Right, Up, Up, Up, Down, Down, Down, Left, Left, Left, Right, Right, Right
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