Enter "bugcheats" at the main menu to enable cheat mode. Then, enter one of 
the following codes during game play to activate the cheat function. 

Result             Code  
-----------------------
Insects are slow - slowbug  
Turbo speed      - turbomode  
Additional life  - addlife  
More credits     - addscore  
More gasoline    - addfuel  
Activate shield  - shield  
Level skip       - nextlevel  
Retro view       - retro  
Lightning        - flash  
Super Heli       - call