Tip your phone and roll the marble to the gold hole. Fall right through to the next face of the cube. Six faces. It gets twisty.
You rolled the whole way round. Cube Two is trickier: dark holes send the marble back to the start of the face.
Cube Three plays dirty. The mazes loop back on themselves, so hugging one wall gets you nowhere, and the holes sit right beside the good route. Take it slow.
Eighteen mazes, one marble, zero doubt. The marble salutes you.
Rotate your device to continue.