Level and room select
 
 Enter "HOUSE" as a password and start the game. Then while playing
 the game, press R1 to select a new level or R2 to choose a room.
 
 Invincibility
 
 Enter "INFIN" as a password.
 
 Infinite ammunition
 
 Enter "JUICY" as a password.
 
  Game Shark Codez:
 
         
  Invincible                                    
  8011CD1E 0092
         
  Infinite Health                               
  8009B162 001F
         
  Infinite Lives                                
  8009AEB4 0003
         
  Infinite Oxygen                               
  8009B030 0EF3
         
  Infinite Green Weapon Energy                  
  8009AF0E 0024
         
  Moon Jump                                     
  D009B150 0001
  800C16C4 0100
         
  Have All Keys                                 
  801BE972 0001
         
  Have All Keys                                 
  801BE95A 0001
         
  Have All Keys                                 
  801BE98A 0001
         
  Always Have Red Homing Gun With Infinite Ammo 
  8009AC0C 0006