I don't know if I'm wrong, but the way I see it, it's meant for kids who aren't very old. I think it's like this because it's not very hard, it just takes time. It's a complicated game, but its general gameplay is basic and simple, with a few puzzles which aren't of high difficulty either. Yes, it's a fun game and people of all ages can play it, but I'm just saying that it might've been designed to suit younger players.