This is really beautiful. However, be warned, the webGL widget completely froze my Firefox (on OSX), I had to kill the process to recover. No problem in Chrome though.
My general experience with WebGL demos on HN have been that they only work in Chrome. I prefer Safari as my everyday browser (for no configuration iCloud sync reasons), but even with "Enable WebGL" checked, no WebGL apps seem to work.
http://floored.com just jams for me in chrome on osx; I just see a rotating blue triangle and nothing else
It probably doesn't use the latest version of the HTML5/WebGL plug-in (the entire technology stack is still alpha/beta). I recommend something more sandboxed, like Unity3d plug-in which lets you use proper OpenGL.
The shaders fail to compile on my Firefox with messages like: "Shader: Can't compile: ERROR: 0:149: '' : integer constant overflow".
Works fine in Firefox Nightly on Linux with Intel drivers.