The object of Spider is to put all of the cards in order so you can clear them. You must start with King and stack the cards all the way down to Ace. You can only stack cards on top of the card immediately preceding it. The order is: King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2, Ace
You have to clear the entire board to win the game. There are cards in the bottom right that will add cards to the bottom layer of every stack. You can use these when you are stuck or when you feel like you are ahead, but you will have to use them all eventually in order to win. Win the game 10 times by clearing the board to get this achievement.
If you clear the board 100 times you will unlock this achievement -