Phun, though it looks childlike is a very sophisticated 2D physics simulator. You can create amazing things with it, especially along with a vector graphics program, such as Inkscape, which is free and open source. Download Phun, free for non-commercial use from phunland.com. All the files shown in this video can be downloaded from phunbox.net, search for Gamma , author.
Music: Ramfut Summer, Michael Natale and Lipbone Redding c 2000.
To anyone checking this out from Vimeo, these are all graphics that I created, this is not just a video game recording.