Christophe, nice design idea! BTW for GIF Export you need to set option AnimationRepetitions -> Infinity for constantly looping (replaying) animation. Currently the animation plays just once and then it looks like a static image and people might miss that it is animated. People also have to reload the page to restart animation. For more details see Options section here:
http://reference.wolfram.com/language/ref/format/GIF.html
