Kinetic Art is a physics-based arcade game made for art's sake back in 2010. Uses Allegro for graphics, Chipmunk for physics and OGG/Vorbis for audio.
https://www.youtube.com/watch?v=dX43Ka3QnWE
Released into the public domain.
See LICENSE for more information.
Background music track, 'Loopholes In Time', is distributed under CC-BY.
All images are also distrubuted under CC-BY. Backgrounds are rendered with Apophysis, freeware fractal flame editor.