Needs SDL libraries installed. Run via Menu->Fun->MatchBall, or enter matchball in a console.You have to click to remove all adjacent balls with the same color and reach as many points as possible. Sounds easy, but beware, this game is extremely addictive.
Matchball has full rendered backgrounds and translucent balls, supports different ballschemes, different levels, music and fx, a setup menu and a complete highscore system for each level.