A detective story on Game Boy, that's very cool !
The limited palette of the Game Boy is a bit creepy so it's perfect for grim stories such as a murder in a big "haunted" mansion.
On the downside it might be a bit buggy at some points, it lacks a Save feature (but maybe it's not possible with GB-Studio I don't know) and sound effects imo.
Have you ever played the Detective Conan (Meitantei Conan) games on Game Boy ? You might like them I think...