If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This is a game about love. But you know it's not always love. Sometimes you are angry. The boy and the girl are playing against each other. It's winter, so how can you express your anger to your sweetheart. Exactly, by throwing snow balls. You can throw snowballs to each other. Try to hit each other, but even that's not always easy. There's a cold wind which blows your snowball in the wrong direction. What will happen in the snow, will they make it up or will they stay angry?