10.3.8, PB 15" 1.5GHz, 512MB RAM
The cube rotation is a bit flaky, however. It doesn't let you rotate the cube 360° in certain directions (I'm talking about the cube itself here, not individual sides). Also, when I finally solve the cube, the centers don't always match up (due to the texture being hilighted on one side--may I suggest lighting effects? ;-)
All in all a good start, but the rotation issue can get a bit irritating.
Rubik
Rubik's cube puzzle implementation
Version: 1.1.5