By pressing up and down arrows choose there to put current card. You could send card to up stack or to down stack. If you put two cards of same stripe together you get score for them. Chances to get maximum score depends on 70% of player skills and 30% of cards order in deck. In the game present some obvious technique and some non-trivial technique. So after you have been played once you want play again to use new learned trick and to get more lucky cards.