Donate $10,000 to the mayor
Type "fund" during game and press [Enter].

Test mode
Type "t" during game and press [Enter].

$1,000,000
Grow oranges near New York City for five seasons and ignore crop failures.

Display version number
Type "v" during game and press [Enter].

Free Money
During the game hold shift and type "corn".

Laughing llama
Type "llama" during game and press [Enter].

Natural fence
Instead of costly fences, use irrigation ditches to quarantine your livestock.

Three cows in perfect health
Type "poultry" during game and press [Enter].

Fill water trough
Using the Hand icon, place an empty water trough under a bale of hay.
Then set the Speed option to "Ultra".
After about 15 seconds the trough should be full of water.

Email me if any of these don't work!