Here is a game that is both challenging and soothing. You move your cursor over a bubble and pop it, any bubbles that bump into the burst bubble's cloud also pop. You stay at a level until you pop the required number of bubbles in a frame. Eventually you need to pop 55 bubbles as a chain reaction...try it!
http://www.bored.com/boomshine/index.htm
http://www.bored.com/boomshine/index.htm
