This is a card solitaire game. You need to clear the whole screen passing all cards to the bottom stack. You can use cards one rank higher or one rank lower than the top card of the bottom stack. For example, if you have an 8 in the bottom you can use 7 or 9. You can then continue the same way. If you used 9 you can use 10 then 9 again, then 8 etc. If you don't have any relevant cards, you can click on the deck, take a new card from it and place it on the top of the bottom stack..