Bouncing Rainbow was done with Processing and ported using Processing.js
Music through HTML5 Audio element with audio codec compatibility detection before injection.
Simple audio player with jQuery.
Song 'Dennye' from the album 'Safafa' by Jellica
If you fork this you will also need a folder at root called 'audio' and inside it this song: http://mcdlr.com/bouncing-rainbow/audio/8bp123-01-jellica-dennye.mp3
If you don't see the player is because the client doesn't support mp3 format, yelp!