During gameplay hold down the START button to bring up the sonar screen. Then press Right, 1, 2, 1, 2, Down, 2, Up. This will allow unlimited continues, invincibility and other options to be turned on or off from a menu that will appear on screen.
Sip to the city of forever,part 1
To skip to The City of Forever, part 1 Level enter OKBKI as a password on the password entry screen.
Skip to machine level
To skip to The Machine Level enter KOWMP as a password on the password entry screen.
Skip to medusa bay
To skip to the Medusa Bay level enter QMBRB as a password on the password entry screen.
Skip to open ocean level
To skip to the Open Ocean Level enter QYEKR as a password on the password entry screen.
Skip to origin beach level
To skip to the Origin Beach Level enter CCRIJ as a password on the password entry screen.
Skip to Ridge water level
To skip to the Ridgewater level enter VADJR as a password on the password entry screen.
Skip to The city of forever part 2
To skip to the The City of Forever, part 2 Level enter MEMSK as a password on the password entry screen.
Skip to the cold water level
To skip to the Cold Water Level enter IAFWN as a password on the password entry screen.
Skip to the dark water
To skip to the Dark Water Level enter WGUKK as a password on the password entry screen.
Skip to the deep water
To skip to the Deep Water Level enter YAHWV as a password on the password entry screen.
Skip to the tube level
To skip to The Tube Level enter GGWAO as a password on the password entry screen.
Skip to undercave level
To skip to the Undercaves level enter AGCFU as a password on the password entry screen.
Skip to vortex level
To skip to The Vortex Level enter WCSKQ as a password on the password entry screen.