The Cast Marble puzzle is part of the famous Hanayama Cast Puzzle series and was designed by Akio Yamamoto. The design of the puzzle is inspired by the shape and beauty of marbles, with its metallic pieces elegantly intertwined. It presents a challenging task of separating and reassembling the parts. Rated at a difficulty level of 5/6 stars, it is a medium-level puzzle compared to others in the Huzzle series, balancing difficulty and aesthetic appeal.