Just type in these codes in the chat window:

 king arthur       - changes eagles into dragons (999 HP)
 grantlinkspence   - more firepower to all shooting squads
 pow               - new unit: BabyPrez (Baby on trike) (500 HP,
                     50 str, 10 arm, 15 rng)
 convert this!     - new priest unit ("Saint Francis"), who kills his
                     enemies by lightning (25 HP, 200 str, 0 arm, 10 rng)
 stormbilly        - get a sci-fi robot ("Zug 209") (100 HP, 20 str,
                     10 arm, 15 rng)
 big momma         - Car with rocket thrower
 upsideflintmobile - More speed and fire power for archers on wagons