Love this fifteen puzzle, its great all about design and puzzles it self. The only thing I would change is that when I rotate the whole puzzle in 3D mode, it's that I can rotate it as much as I want and stay it. Because it is very important for me to see some cubes from specific angles constantly at that moment as I go down, especially when it is a more complex sculpture, not to move me to another diagonal. Literally like holding a cube in your hand, should be a simulation. The rest is all beautiful. 😊🙌🏼👑