(+) means ur game is no longer valid for high scores.
Version 1.05 and Above:
venture capital - adds $100k to your money (+) cashing in my options - adds $100m to ur money (+) crash - sends all your money down to the big fat zero (+)
send in the clowns - everyone is a clown reaping the benefits - every one is a grim reaper stop the silly - turns everyone normal again if they were a clown or reaper
Version 1.07 and above
research frenzy - all reasearch is done ( no more reasearches now LOL) (+)
catzilla - all cats are 3x bigger
moar catz - adds 50 cats to your game (+) (and PS. thats how u do spell the cheat code, every cheat code is spelt correctly)
The cheats are listed in the original post here, as well as on the actual game. Just open the in-game menu and look at the cheat code block on the bottom. Just above the OK button is a link labeled "need codes?" Click the link to access the cheat code list in-game.