There can be only one! Clear the cards from the table. Stuck? Use a Joker!
Click the cards to move them down from the table. Try to clear all of the cards in each level to move on to the next one. Use the joker if you are stuck, but keep in mind that you get a bonus if you clear the level without using it!
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.