Downfall is a two player game inspired by a game I used to play on the Atari ST. Try to channel your snow into the hole at the bottom by drawing and erasing lines using the keyboard controls - this will make your opponents screen move up. If your snow reaches the top of your screen you loose.

There are several options such as game speed, multi-coloured snow and an option to enable or disable the ability to sabotage your oponents screen!