There's video on the developer's website that provides somewhat of a demo.
I'm using Chrome 39.0.2171.71 on Linux x64.
New video - https://youtu.be/EKbjMcX-PwQ
Old video - https://youtu.be/fSh6Q0F4d9Q
You were probably down-voted because people feel that what they did dwarfs the color they chose for their background.
You're kinda hating on something that doesn't matter. :)
IMO this is one of the main problems with HN.