Level
select
Select two player
mode, then enter hg? as your initials. Return to the main menu and start a
single player game. At the world selection screen, hold L + R and press Select.
All levels will now be unlocked. To lock all levels again, hold L + R and press
Select again.
Bonus
Stages
Place first in
every high score board on every stage to unlock their world's respective bonus
stages.
