Peter Molyneux stated that he came up with the idea of creating "Theme Park" because he felt the business genre was worth pursuing. He said that "Theme Park" is a game he had always wanted to create, and wanted to avoid the mistakes of his earlier business simulation game, "The Entrepreneur": he wanted to create a business simulation game and make it fun so that people would want to play it. In an interview, he explained that the primary reason he created "Theme Park" was because he wanted players to create their dream Theme Park. Another reason is he wanted players to understand the kind of work running one entails. The three difficulty settings enable players to choose the desired depth: simply having fun creating a theme park, or making all the business decisions too. Molyneux stated that the most difficult part to program was the visitors' behaviour.