Yeah, there's a lot going on in your game and different people think in different ways. For example, I noticed immediately that the jewels were in the wrong order but although that was odd and I knew it meant something it didn't make me think of forgery because to me a good forgery is something far more subtle and hard to discern. So my advice is use a standard game engine, while you're still starting out, which solves lots of usability and UI problems, and test with as many people as you can to observe how they approach problems and interpret the information they discover.