Klonoa: Door To Phantomile

Level select 
Beat the game and then return to the title screen.
Now select the "Continue" option and then select "Vision Clear".

Balue's Tower (Extra Vision) bonus level 
Rescue all 72 Phantomilians.

Music test 
Beat the Balue's Tower bonus game.
Then on the level selection screen, a music test option will appear.

Control title screen 
At the title screen, press L2, R2 to blow the leaves off the screen.