Just a quick plug for the game "drops!". It's a very good game, at least as addictive as any of the other "connect four" style of games. I had a little bit of trouble purchasing the license, in a sense having to resort to bartering in the end! Just think, you too can get over 500,000 one day: http://www.awesomemegamightygames.com/pages/en/games/drops/highscores.php