Mass Attack, by kbaum games, is an enjoyable action puzzle game based on the very simple idea of balancing weights on a scale. Each of the 7 increasingly more difficult levels have 4 parts that must be balanced within the maximum difference allowed to advance. Just press the mouse button to create a counter balance weight. The longer you hold down the mouse the larger the weight that is created. Mass Attack is a good distraction and worth a few minutes of your time.
Cheers to Drondh and Gregory for suggesting this one. =)