Good idea...
Great concept (Well, anything that saves me a trip to the store and a couple bucks is a good concept in my books) and easy to play. I also liked how you added an easy mode in there where you can see the moves being made. The speed is way too slow and you need to be able to actually rotate the entire cube to see what's on the back. Other than that though, great job for a beta, just make sure the final submission fixes those problems.