From the publisher's website:

So you think you're good, huh? Well, try this for size: you need to beat your opponent by getting rid of all your cards AND get the job done in 59 seconds! If either of you can't win before time runs out, you need to start the round over! The first one to win 5 rounds is the winner!

59 Seconds™ isn't called the world's fastest card game for nothing - you'll need skill, speed, and lightning fast reflexes to master this game!