Alternate Puzzle mode menu:
     Get  10,000 points in Trial mode, then press Select at the Puzzle
mode selection screen to change the background color.

Bonuses:
     Successfully   complete   the   indicated   task  to  unlock  the
corresponding bonus.

Chiccolor Background:   Complete 40 stages in Puzzle mode.
Flower Background:      Complete 20 stages in Puzzle mode.
Japan Background:       Complete 80 stages in Puzzle mode.
Street Background:      Complete 60 stages in Puzzle mode.
Kasuri Image:           Complete 30 stages in Puzzle mode.
Raydust Image:          Complete 50 stages in Puzzle mode.
Roller Image:           Complete 70 stages in Puzzle mode.