Type HORZA when you are asked for your name when saving the game.
 Now start a new Park. Again where it asks for your nickname type
 HORZA. When you are in the game all you have to do is hit is
 [C] and you will get about $50,000. You may use this as many
 times as you wish.

 Also you can hit [Shift][Z] for all the trees, bathrooms etc. and
 [Ctrl][Z] for all the shops and [Alt][Z] for all the rides.

 You can also try as names:

 Demo           Ready build park
 Disneyland     No loan