The world's toughest geometry puzzle now has a 3D option.

3D mode brings 17 solids to Entropy Zero. Rotate a torus, a Menger sponge or a Klein bottle and switch every node on. Tapping a node flips its neighbours, so each shape's geometry changes how a solution unfolds — a cube plays nothing like a fractal. Connections between nodes are now drawn, so you can see the structure you're solving instead of guessing at it. Find it free in the Configurator under 3D Structures. Sandbox scores post to a leaderboard for that exact shape and size.