Type during game:
 
 Code        Result
 ------------------                              
 ETGOD     - God mode on/off
 ETSTUFF   - Got all the stuff you need
 ETFLY     - Got Wings, Chicken/Fly mode off
 ETWIN     - End current level and go to next level
 ETDRONE   - Battledrone/Upgrade
 ETSCAN    - Display map on/off
 ETALIEN   - Play as Alien
 ETRESTART - Restart current level
 ETRAIN    - Play in a rain storm
 ETMAPS    - Check user maps menu
 ETCAT     - A cat runs off
 ETPULL    - Throws a cat
 ETBOOM    - DEATHWISH?