1- "6D7FBC0F" | 4- "6CF3BC0F"
2- "6DFBBC0F" | 5- "6F6FBC0F"
3- "6C77BC0F"
Each level has a large number of possable codes, since the code used also determines your lives, ammo, and weapons. The level codes above will give you 9 lives, all weapons, and all ammunition.