You have to draw cards oe at a time from your stockpile. Select the cards that are higher or lower i value to your draw card to remove it from the playig field. To complete a level you eed to remove all the cards from the playig field without ruig out of cards from your stockpile.

It is a Halloween variation of Solitaire. You need to pass all 100 levels. Use jokers and other bonus cards to simplify the process. You can get the bonus cards by clicking on the ghosts and other spooky characters.