First write GABBAGABBAHEY while your playing, then will the codes activate.

RACERX = Immortality
SCOURGE = All Weapons
MITZI = All keys
GUILE = Invisibility
TWILLIGHT = Full loaded shields
FARMERJOE = Warp to any level you want, press alt and F to get a complet map.
BRUIN = Extralife.
BIGRED = Super weapons.
ASHIMA = The robots cant shoot.
FLASH = The road points out with pover-ups.

There is three hidden levels if you can find hidden exits nere the real exits on stage 10, 21 och 24