It’s small, simple, and addictive like crack cocaine!  It looks like a moving version of something a 5 year-old drew, but don’t be fooled by its simplicity - some of the levels are hard!  Some indie game developer named Petri - who has a policy of never taking more than 7 days to develop a game - created this little game and then broke his own 7 day policy to create Crayon Physics Deluxe, which won 20k at the IGF (Indie Games Festival) just this past February.  Please, now I must find this for my iphone...this would make my subway ride about 20k times more fun.