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CHEATS
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Pause the game and enter a code. A sound will confirm correct code entry.
Repeat this code to disable its effect.

No gravity                  X, Z, X, Z, UP, UP, UP
Low gravity                 Z, R, Z, R, RIGHT, RIGHT, RIGHT
Unlimited countermeasures   Y, Y, Y, X, X, Z, Z
Transparent car             LEFT, RIGHT, LEFT, RIGHT, Z, Z, R