How the Cheat Screen Works
Press and hold the "Command" and "Option" keys as you click the "Start" option in the main menu. This will bring up a box with two spaces, one for a Starting Level and one for a Vehicle. Type a number from 1 to 10 in the Starting Level box to play the corresponding level, for example, enter "3" to play Track 3. Enter a number in the second box to select a vehicle to drive; there are many to choose from.
Standard Vehicles
Enter the numbers "138" to drive a black sedan or "132" for a yellow Volkswagen Bug. Get behind the wheel of a pink Cadillac convertible by entering "130." Or if pink isn't your color, type "133" for a yellow convertible. Use the code "134" to drive a grey station wagon or "136" if you would prefer a white van.
Motorcycles
If four wheels sounds like two wheels too many, there is also a selection of motorbikes to try out. Enter the code "140" to ride a black motorcycle or go for a brown motorbike by typing "141." For something different, input "148" and you ride around on a military motorcycle.
Special Vehicles
Type the cheat code "145" and you can drive a yellow school bus or enter "230" to get in the driver's seat of an ambulance. If this still seems a bit too normal, enter "209" and you will drive a sailboat along the road. Or you can leave the road behind all together; type "218" to fly a military helicopter.
Objects
It's possible to swap your vehicles in "Reckless Drivin'" for immovable objects. Driving isn't an option; these cheats are purely for comic effect. Enter "149" to play as a tree or "193" for a toll booth. The code "237" places a cow skeleton where you would normally see your vehicle. Use the code "252" for an exploded gas station and "244" for a small house.