Use the following codes as password:

IMMORTAL - 31 lives
NEVERDIE - Invincibility
HORMONES - Full health
GETACCES - Level select
OCMCKKEJ - Level select
MAKMYDAY - Weapons
GONAHURL - Rolling camera view
SKATBORD - Speed mode
GENETICS - Mutant mode
ACIDDUDE - Psychedelic textures
JUSTKIDN - Regenerating monsters

Level codes:

 Level         Name                                   Password
 1             Ice Prison                             EMIAGCAI
 2             Zorrscha's Lab                         OMACCBAI
 3             Hot Pants                              FAIAGCBI
 4             Stan's The Man                         FEKAGCCA
 5             Oyster Desoyster                       LGBFIICE
 6             Puzzle Wood                            LMBBIIEE
 7             Temple Of Nori                         IEBBIIGF
 8             Egg! Egg!                              KNBBIIAI
 9             Huevos Libertad!                       LGBJIICI
 10            Pipe Hous                              LOBJIIEI
 11            Hate Tank                              IGBJIIGJ
 12            Fantabulous                            FFCAGCCC
 13            Mr. Schneobelen                        FHCAGCCK
 14            Collide O Scope                        FJKEGCDC
 15            The Zoul Train                         FLKEGCDK
 16            Lick The Toad                          ADIKBIIB
 17            The Bitter End                         ADMIBIID
 18            Rub The Buddha                         MAECCBEJ