I prefer the windows version

I don't see the added value of this game (except perhaps the timer). Gameplay isn't very smooth: when dragging a card with the mouse it doesn't always fall into place easily. This is much smoother in the windows version.

That I can't move the king to an empty slot may just be a different rule interpretation, though I prefer to be able to. Something that should definitely be changed, however, is the way all free cards that can be put on a pile are automatically placed. This can result in not being able to place some of the lower cards of a color because the ace isn't free yet and cards of the opposite color are already on the pile.