There are a couple videos of a Rubik's Cube in croquet space on YouTube. Looks like this is work done by one of Robert Hirschfeld's students.
- Video 1
- Video 2
- Video 3
Robert is the author of various Squeak packages like AspectS or MethodAnnotationBrowser.
Unfortunately he now moved to Potsdam to work for the Hasso Plattner Institute. We are both native-born in Thuringia (which is one of the most beautiful landscapes in germany by the way) and I miss the endless Smalltalk discussions with him after work in Munich's beer gardens...