I am almost 13 years old and i have played some of the ND games. In my opinion, this game was one of the longest I have played. I have only played four of them, Message a Haunted Mansion, this one, Treasure in the Royal Tower, and the Final Scene.In this mystery, you have to make many trips back and fourth. When you first start, there are many names you need to remember or things become very difficult. Although it was long, I had a lot of fun. There are many puzzles and games. You even get to disarm a bomb.The end of the mystery has a big twist that shocked me. So if you have the time to play this one, I would recommend it. But if u don't, you will have a difficult time.