for this you need: (1) a recent, decent Mac or PC
and (2) a WebGL-capable browser such as the latest Chrome, Firefox or Safari (Safari needs tweaks)
— for more info, see http://get.webgl.org
responds to:
click + drag
— scroll-wheel
— pointer position
— click (on snowflake)
— space, p and esc
— made by:
George MacKerron
of CASA
using three.js
— GitHub source