Move the yellow ball along the wires from the red dot to the green one. Use the arrow keys to move within a layer, and I/O (in/out) to move between layers. The currently available keys are marked on the maze, at the points they would lead to. Move the mouse to change the viewing angle. Mazes are randomly generated, and each time you win, you get a more complex maze. Press R to return to the red dot.
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