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If using a teen character, the player may also flirt with the opposite sex. The player may also talk and interact with their guests to become friends. The player can build facilities that would be available in amusement parks, such as bathrooms, food stalls, drink stalls, and even hat and balloon stalls. In party play mode, players can play all the minigames available against the computer or friends. Park guests must be kept happy by use of roller coasters and race tracks, carnival rides, and games like bumper cars and arcade games. The concept of the game is to design and build a theme park that will satisfy tourists looking for a thrill. The player is then given access to Treasures of Thrillville, the fifth and final park. Finally, Garrison is tricked into stealing Mortimer's idea and creating Lice Land, whose catastrophic failure leads Garrison to file for bankruptcy. Meanwhile, the player must manage Thrillville Adventures to compete with the increasing popularity of Globo-Joy parks. After discovering the bugs, Mortimer designs a fake flea-themed park, which Mortimer allows Garrison to think is a real idea. After restoring Timewarp and undoing Globo-Joy's sabotage, the player is sent to manage Thrillville Paradise, where Globo-Joy is using bugs to commit corporate espionage and steal Mortimer's ideas. Additionally, it is discovered that Globo-Joy is sabotaging the park. The player is assigned to manage Thrillville Timewarp, a park with many rides and attractions that are broken down. After successfully managing Thrillville, a competitor, billionaire Vernon Garrison, enters the market with his brand Globo-Joy.
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Enamored with the designs, he tasks the player with managing his theme park, Thrillville. The player is left a voice message by their Uncle Mortimer (Brian Greene), an eccentric inventor and theme park owner with a voice and personality similar to Doc Emmett Brown, who has reviewed the player's roller coaster designs.
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