Thrillville: Off the Rails Hints

If your in the first park (thrillville fantasy) or any other park make sure you complete al the mystery missions and all the missions for that park so when you go to the next unlocked park you will have more rides and coaster pieces to make the guests extremely happy! (if you unlock the next park and not all missions are completed then WAIT until all the missions are completed) it helped me keep my guest happy!