"Collide and Play" is my entry for the Developer Challege
here is the C&P thread in the DC forum with info and MP3s
from the C&P Help.rtf:
This is a standalone program for Windows designed to compose ambient music in realtime by the interaction of animated graphic elements. These elements are partially controlled by the musician, and partially autonomous, controlled through specific collison and movement behaviours in a 2D environment.
This program may also be used for live performance, allowing the audience to follow the graphic evolution of the track by means of a large screen or projector mirroring the PC monitor of the performer.
This Collide and Play is what I call a "software instrument" opposed to "virtual instrument"
as it does not imitate or emulate a real world musical instrument.