If you want to cheat, type CASS during the game for extra pocket money. Use it too often though, and you'll get a fire storm. Try FUND too. Also type in PORN and some bloke will shout, "I can't get enough!" Try VERS to see what version you own. Type MEMY to see how much memory you have. Type in DAMN, DARN, HELL or HECK and all of your residential buildings will turn into churches (careful; though you can't actually turn them back).
To get $500,000 and bonuses, click on the toolbar as though you were going to move it and type BUDDAMUS.