Another World 

At the main menu screen that reads, "Game Start", Time Attack", 
and "Options", enter L button, up on D-pad, R button, and down 
on D-pad. This will give you access to "another world" full of 
new puzzles. After entering this code, a tiny character will 
appear in the lower right portion of the screen. Select "game start" 
and when you select "Puzzle Game", it will say "Another World" 
underneath it. Press A and you'll go to another world!