Enjoyable experience with a considerable amount of content to get through. Very creative idea and spin on the challenge. Unsure if the game's UI is supposed to show four inventory spaces if it seems like you can only use two? If the other spaces are for a different kind of item, maybe you could give them a distinct flair to make it seem like they have another significance. Not being able to hold more than two items make sit hard to experiment with and remember gem combinations.