Very nice indeed. I'm not a programmer, but i'd love to take it a step further, by getting the flip action to 'flip' and then 'expand' to the size of the whole canvas. Personally i think that would be neat.
Looks nice. I'd use it for a game of Memory instead. Sponsors would probably much prefer a simple click-through.
I was thinking exactly that, a memory game using websockets of course and node js.