I wanted to share another game that i've been following the development of for a while, it's called Crayon Physics Deluxe.

1. Each game must be made in less than seven days,
2. Each game must be made by exactly one person,
3. Each game must be based around a common theme i.e. "gravity", "vegetation", "swarms", etc.
"The Experimental Gameplay Project is about discovering new forms of gameplay. Each game must be made in less than 7 days by 1 person, and show off something we've never seen before."
Crayon Physics Deluxe won the Seumas McNally Grand Prize at the Independent Games Festival in February 2008, and you can preorder a copy for $15 from the website http://www.crayonphysics.com/
Crayon Physics Deluxe from Petri Purho on Vimeo.
The original Crayon Physics can be downloaded from softonic