Crayon Deluxe 1c or over till 15 of Jan
Crayon Physics Deluxe from Petri Purho on Vimeo.
Basically it’s pay what you want to get your hands on this innovative little game till Jan 15th. It’s a lot of fun for a short while. Though their servers are getting pretty hammered at the moment.
http://www.crayonphysics.com/