To play as Daisy the Cow Ship, enter the password "LLLLLLLLLLLLLL" or press Up, Left, Down, Up, Left, Down, Right, Left, Down, Right, Square, X, Circle at the Ship Selection screen.

For a mystery car, enter the password VVVVVVVVVVVVVV, then start the game. To drive this car, look on the car selection screen for a vehicle with no name.

For access to level 2 with the super car and a bonus, enter the password "4xvhbbbcdbcdbg".

At the main menu, highlight OPTIONS and press Circle, Square, Triangle, Left, Right, Up, Square, Right.