This is a great puzzle game that is easy to learn. The levels gradually increase in complexity, but are not overly challenging and are not frustrating. With time and perspective, all of the puzzles can be figured out. My favorite part was Idas Dream, since those puzzles were the most challenging and require a good level of spatial manipulation in your mind to figure out, especially the final puzzle. I like that some puzzles require you to work in multiple planes to solve. It is worth the price, since the game is based on quality over quantity. I love the geometric shapes, 3D perspective, and look of the game too. I also bought the expansion pack, which adds more great levels to enjoy. The designers did a fantastic job in creating engaging puzzles.