There are usually multiple strategies to successfully completing a scenario; these can be discussed on the scenario's discussion page or written down in an existing or additional section of this article.
This park is very intimidating at first glance, but it's easier than it looks. Start with a Rollercoaster and Ghost Train/Car Ride in the biulding to make the long walk to the roof more fun. Now, biuld on the roof until you run out of room. With the roof out of the queston, biuld around the skyscraper.