Clear your cards faster then your computer opponent. Drag one card at a time from your hand (bottom) to one of the four discard piles in the middle of the screen. If the arrow under the deck points up, place a card that is 1 higher on top. If the arrow is pointing down, place a card 1 lower in rank. Going up from 13 is 1 and going down from 1 is 13.
There are 3 special cards:
* Wild cards can be played on any card and any card can be played on top of it.
* Blue cards with a circular arrow will reverse the direction of the deck.
* Lighning cards will score a bonus if you play on top of a lightning card.