Leafy Lake is a fun, easy level. In essence you set all of your rides down to free right away, and set a gate fee of $5. Watch as people come in and slowly increase your gate fee as there is more for the people to do.

Build simple rides - ferris wheels, water rides, and stick a roller coaster and cars up near the top of the map. Don't forget to put benches and trash cans by your roller coasters!

I like the 'food court' system - give them a nice bit space and lots of food options, benches, and trash cans. They'll go for a burger, go sit down. Go back for a drink, go sit down. Go back for an ice cream, go sit down. Then they'll go off to ride on rides some more!

Roller Coaster Tycoon Walkthrough