At the start of the game, swim left to enter the password screen.

Password	Effect
BCCGB	02 Vents of Medusa
BDGAA	03 Maze of Stone
GEGEI	04 Sea of Darkness
VFFCB	05 DDD Swimming
AEACK	06 Skyway
FHCUA	07 Tube of Medusa
AMBAL	08 DDD Swimming (2)
BBBOJ	09 Getaway
MQEGC	10 Asterite Cave
RFGLJ	11 The Eye
AAKWA	12 Deep Ridge
XHFKJ	13 Sea of Birds
GGKWI	14 Convergence
XDCPB	15 DDD Swimming (3)
QBHSA	16 Vortex Future
FSXEK	17 Globe Holder
WPDCM	18 Convergence (2)
KFDTH	19 DDD Swimming (4)
QJHGE	20 New Machine
XMHGM	21 Vortex Queen
KBHTP	23 DDD Swimming (5)
UNLSE	24 Atlantis