Various Cheats
     At the Code Entry screen, enter any of the following "Codes":

Code                   Effect 
JMPTT                  Level Select 
DNGDM                  Invulnerable 
MRRMR                  Thick Armor 
VRLRDS                 Overlords 
TWLVCHTS               All Cheats 
ZPPY                   Fast Planes 
HMMR                   Bigger Guns 
QD                     Biggest Guns 
FRHS                   Rapid Fire 
NSTNT                  Speed Shots 
TWFSTD                 Double Bux 
GRTD                   Every Movie 
SNKY                   Ghost Mode 
NDBMBS                 Dual Fire 
DZZY                   Spin Shots 
DH                     Top Gun 
SPRLZY                 Every Level/Cheat Unlocked 
WNNNGS                 Extra 10 Bux 
PYRS                   Weapon Up At 3 
SMSHNG                 Plane Wins 
NDCSN                  Switch Planes 
SCRW                   Shields On Roll 
WNRLFST                Valhalla 
BXDRW                  Show Boxes 
WYPNT                  Waypoints