This game works inside any web browser and can be played at no cost: http://www.tonypa.pri.ee/nelinurk.html
You'll notice that the game itself is creative-commons licensed, and is a nice example of our music getting more exposure due to the Creative Commons license.
Here is a short animation of my playing the game. I wasn't initially understanding the "find the rectangle" concept, as the bricks don't need to be touching, which makes the game both easier (you can play it longer) and more challenging (there are many rectangles you can build, and the order in which you do so changes the board)
By the way, the same game author has two other flash games with our music on them: