Type At The Title Screen:
rush = silly ships, THIS DOESN'T ALWAYS WORK!!!

Type At The Main Menu:
xteam = gives you Pirahna Team
xtrack = gives you all tracks
xclass = gives you the Phantom Class

Type At The Pause Screen When Playing The Game(the Esc button):
psymega = gives you infinite weapons
psyrapid = gives you a machine gun
psyticker = gives you unlimited time
psyprotect = gives you infinite energy

Type Anytime During The Game:
framerate = displays the frame rate