Start the game and type "COLIN WAS HERE" (A message will scroll across the bottom of the screen if it worked), and use the following keys.
'P'-----------------Add one life (Max 9)
'C'-----------------------Changes weapon
'D'-----------------------------Immunity
'F'------------------------Give you fuel
'M'--Gives 99 items of the weapon in use
'R'-----------------Adjusts your weapons
This cheat doesn't work if you play Wings Of Fury on an Amiga equipped with Kickstart version 2 or higher (but if you use the Kickstart v1.3 emulator it works fine).