Archer Maclean's Mercury

Bonus Level:
Get the top high score in each level in a world to unlock
that world's bonus levels.

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
to unlock all levels. To lock all levels, hold L + R and press Select again.

 