Press [`] and type in:

 hereComesTrouble       Enable cheat mode

 openLevelsGuv          All levels accessible
 cash Increase          + 10,000 Dollar
 setCar [CARNAME]       Change Your car name to [CARNAME]
 makeai [CARNAME]       Create opponent with [CARNAME]
 invincible             God mode
 ai on/off              AI ON/OFF
 WasteAll               Destroy all cars
 lastlap                Start on final lap
 lastcheckpoint         You only need to clear the last checkpoint
 adventure              A text adventure hidden game
 damage_multiplier #    Increase damage to #
 addPowerup #           Add powerup (#=Name)