The Llama commands it: Get rid of all your negative points! Play your cards or you will earn negative points. If you can't play a card, you'll have to decide: Do you quit now, or do you draw a card which hopefully you can play later?
Negative points come in the form of tokens, and if you get rid of all your cards, you can return a token-which may be worth 1 or 10 points. The player with the fewest points at the end wins the game.