Reach the Pier Pressure bonus round (after Year Of The Pac) and get a score of 50,000 or more. A message at the results screen will confirm that a new map has been unlocked. Save the game, quit the game and go to "Multiplayer" option on the main menu. You should have a new place to battle a friend.
Collect at least 70 gold stars. The "Movie Player" option can now be accessed at the stage entrance screen. Note: This also unlocks the "Sound test" and "Music player options.