Complete the following tasks to unlock additional options.

Option	How to unlock
Disable Powerups	Play 10 games (must return to menu 10 times)
End Credits on menu	Beat Normal Story mode twice.
Ghost Sheep	Play 30 games.
Hard Difficulty	Beat Normal Story mode.
Image Gallery	Play 40 games.
Music Gallery	Play 20 games.
Night Mode	Play 50 games.
Omake mode	Beat Hard Story mode.