Press at the title screen to start.
The game starts once you select the level of difficulty and choose a FRIEND MODE.

Select AUTO and the computer will automatically select a friend to join you.
Select MANUAL and you will be able to select which friend will join you before each stage.
Select ALONE to play the game without a friend and have special "options" appear in the game.
The continue screen is displayed once it's GAME OVER. Select YES and press before "King Drool's song" is over to continue.

* Some of the cheat codes that appear after beating "BITTER MODE" cannot be used in this version.