If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
If you want to win the World Cup then you'll need to be the Free Kick King. You face the world's best in the group and knockout phases in your quest to lift the trophy. To shoot just use the mouse to set the direction, trajectory and swerve on your shots to beat the keeper. When in goal move the gloves to make the save. Can you be the king?