This is a very good concentration building tool. And it looks very good, a perfect Mac OS X citizen. Game play is reliable and fast on my MacBook.

The legal unpleasantness connected to this game shows once more we have to abolish patents on concepts. You can sell code, binaries, but not ideas. If the Tetris Company would release an even slicker Mac OS X falling blocks game, I'd play it. Maybe I would even pay five euros for it. But Quinn is hard to beat, in the way it looks and in the way it works.

So there's a pretty picture for you. A company, whose only merit is having bought some patents, waving with pieces of paper and asking for your money on the one hand, and a wonderful game you can play right now without paying a cent on the other. Pick one!