Click & drag the cards - or just click to pick up/put down, and try to arrange the cards in order onto the 4 top stacks. cards in play must be stacked descending, and with alternating colors.
Empty spaces can only be filled with a King.
Click on the face-down 'deck' to deal more cards. On 'casual' difficulty, this will deal the cards one at a time, in the harder modes you will get the cards three at a time.
'Undo' and 'Hint' buttons are available to help you, but will cost you points!