Here is a little project from johnnywc which he has been working on for one week back in May. It’s a port of Atari’s Avalanche. The game supports 1 or 2 player, paddles or joystick. To start a joystick game, press the joystick button. To start a paddle game, press the paddle button.

http://www.atariage.com/forums/index.php?showtopic=110393