Go to the first level then use your sonar to enter the level map by holding 1. Then press Right, Left, 2, Up, 2, Down, 2, and Up. A new menu should appear giving access to level select, music/sound test and many other helpful features.
Enter the passwords at the password entry screen to go to the level shown.
Password Effect UOBVV 01 Medusa Bay WNVKC 02 Undercaves USDNF 03 Ridge Water KOGME 04 Open Ocean WCSYF 05 Cold Water SOWMG 06 Open Ocean 2 OOOAH 07 Deep Water KWGYI 08 City of Forever YUJOW 09 Origin Beach COOSK 10 Dark Water CCSKL 11 Deep Water 2 EEMSS 12 City of Forever 2 GGGKO 13 The Tube CWGWP 14 The Machine IMQSS 15 The Vortex Queen
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