Never got into the Rubik's cube thing, but there was another game on this site where you had to jump through little colored portals that I remember really liking too (pre-Guitar Hero). I'll see if I can find it. This has to be one of the most entertaining I've seen on here in a while.
http://www.2flashgames.com/f/f-The-Mastermind-Game-5845.htm
http://www.2flashgames.com/f/f-The-Mastermind-Game-5845.htm