Everyone has played tetris the normal way in many forms but have you played tetris in round form. When you think there is no other possible way of doing this game in a new way, some one comes up with round tetris or torus. If you want to play it you need to download opera 9 here and then install this game as a widget. Both are free so give it a try and its really hard I have so far not made one single line.
Since you are downloading opera 9 give that browser a try its really good and free. That's my everyday browser.