Beat the dealer. Easy at lower levels but gets harder.
You play against the phone, which is the dealer.
Each player is dealt thirteen cards. The phone is dealt all thirteen Clubs. You will be dealt a number of Hearts and Spades (all with different values), depending on the difficulty level you are playing at. Four of your cards will be dealt face up. The dealer will lay a card face up and to win a point you will have to beat this card using one of your face up cards. Only Hearts can win a point. You always lose the point when you play a Spade. The Ace is the most valuable card, followed by the King, then the Queen and so on to the two. At the easiest level you will be dealt thirteen Hearts. When you play at a difficulty level which results in you being dealt Spades they will replace the most valuable Hearts (e.g. if you are dealt two Spades then they will be the Ace and King and your most valuable Heart will be the Queen).
You can play the game so that each time you win you advance to the next level of difficulty or elect to play it always at the same level.