I enjoyed the humorous yet mature writing style, and the titular character much more than the game itself. The only real puzzle is figuring out the solution to the crime, by interviewing all of the suspects. Ultimately the main character is so likable and funny that going through every dialogue option was buckets of fun. You will find yourself going "back" to check all of the options.
The character of Bell Park is one of the most well-developed teen characters I've ever seen in IF. Although in general I despise twine games, I think the format really worked for this game. It would have probably been less interesting as a short story, for example, because part of the fun was going through all of the different dialogue options.
I would recommend this game to people who don't like Twine format in general, because "Bell Park, Youth Detective" really plays more like a Choose Your Own Adventure book than the typical moody avant-gardism infesting the genre.