Version info
Anytime dueing the game, make sure all letters are in caps, and type the letter V and hit enter, and it should show you info about the version.
LLama info
Anytime during the game, make sure all letters are in caps, and type LLAMA and then hit enter, and a little screen will come up and it will say something about llamas.
Crop circles
Anytime during the game, make sure you type the code in all caps, type ALIEN and if you have any wheat fields, little crop circles will appear along with cool music.
Test info
Anytime during the game, make sure all letters are in caps, and type the letter T and then hit enter, and it should tell you test info.
Codes
corn+enter - gives you 10,000 dollars fund+enter - donates 10,000 dollars to city with out cost.