No problem! Of course the really awesome feature would be the ability to drag piles of cards and have it automatically determine whether there is enough space up top to do the swaps. (ie if you have 3 spaces open at the top-left, you can drag a 6543 onto a 7 in one step.) Similarly automatically putting cards up on the top right once they're exposed and there are no lower-value cards left. Obviously those would be rather more work though!