Take on the top boys of IT in a snowball fight. Choose your opponent and click "start".

Dodge with the left and right cursor keys while pointing your mouse at your opponent, left clicking to fire.

Your opponent has unlimited snowballs, while you only have 10, so use them wisely, or lose badly.

N.B. A resolution of 1028 x 768 or greater is recommended.
Don't use your mousewheel to scroll as this can put your aim right off.