We Love Katamari - UnlockBonus movie

UnlockComet level:
Successfully complete the game, then talk to the astronaut to play the Comet level.

UnlockComet shower:
To use the Comet Shower you must unlock all of the comets by completing levels in the game, by a certain amount of time. After unlocking all of the comets go to the planet viewer and use every comet by pushing a certain button. The Comet Shower should begin.

UnlockCousin Collecting level:
Find all the cousins, then talk to the boy with the yellow shirt to play the Cousin Collecting level.

UnlockMemorial option:
Successfully complete the game to unlock the "Memorial" option. Select it to access the game's music and movies.

UnlockMillion Roses level:
Successfully complete the Cousin Collecting level, then talk to the rose to play the Million Roses level.

UnlockStaff Credits level:
Successfully complete the game, then talk to the girl with the yellow shirt to replay the level that featured the game's credits.