• Python 2.x, x>=6
• VisualPython the last release of v5 or any v6 should work. Needs confirmation.
• NumPy is included with VisualPython under Windows.

Once the requirements are installed, invoke rubiks.pyw with the Python interpreter. Usually, double-clicking on the file in the customary fashion accomplishes this. For the command-line users out there:

python2 rubiks.pyw

There are helpful comments at the top of rubiks.pyw. I'll improve on that as time goes by.

• I haven't reproduced it recently, but sometimes a random series of turns does not reverse correctly.
• Not all the keybindings work.
• Poor documentation!