Windows 3.1 Only...

Enter any of the following codes during gameplay:

Cheat code:             Effect:
beauregard              all the people in your park turn blue
catsndogs               200 random things are added to your park
hialiens                cause an alien message to appear
paveme                  turns plant like into packed earth tiles
rizme                   makes Rizzo appear on demand
sdi                     gets rid of alien messages
warbucks                gives maximum amout of money