If you press start, the cube shows you one move. Than it stops and after short time rotates to the base position.
Now you have to repeat the move with arrows. Don't try to rotate the cube to the base position, it'll happen automaticly.
Now you press start again (or enter) and the cube shows you 2 moves, than it rotates to the back position... you have to remember it and repeat two moves and so on.
If you'll remember more than 20 moves you are very good!