Cheat Codes: 

            During gameplay, type : 

            ELVIS - Invulnerability 
            TOOLS - All Weapons 
            TAXI - Level Skip 
            MMMMUNGO - Strength 
            BILLY - Speed 
            CAFFEINE - Health


            Level Select: 
            While playing type "taxi" to activate the code. You can now use the 
            + and - keys to cycle through the levels