Ive mastered The Room, Doors and Rooms, and Forever Lost - so the App Store recommended this POS. Not only do the puzzles require extremely little logic, mostly just trial and error, but even when you do figure out the correct navigation then it simply wont work. I tried to toss the marbles where they were meant to go at least 50 times before writing this review and deleting the app. Plus the lack of back story/mystery makes it a really easy game to give up on. If youre going to charge this much for a game, make sure it works better than just on iPad 6 or a tablet. Point and click on the iPhone 5 with this game is such a waste of time because how precisely you need to place objects.