Tap and hold all four main menu options at the same time until a 
virtual keyboard appears. Alternately, tap and hold four points 
on the screen during game play to display the virtual keyboard. 
Enter one of the following codes. 
Some codes will have a confirmation message. Tap and hold four 
points on the screen to resume the game. 

Effect            Code
--------------------------
Toggle God mode - god
Toggle enemy AI - notarget
Full ammo       - give ammo
All items       - give all