alt+1:ammo
     alt+2:guns
     alt+3:energy
     alt+4:immortality
     alt+6:end level
     alt+7:destroy all enemys
     alt+8: copter
     alt+9: tank.
 

Note: If 'levelx' doesn't work, try typing 'oh dear'....

Charles Spellman, Tom, Marko Näiviö and Daniel Embry