Thanks! Not bragging, totally sorry if it looks like I'm! At the very beginning I tried to do something very stupid: create the game using only the DOM. All data in it, no variable, just div, data attributes, classes. It was just to have fun with jQuery limitation (and gosh, I saw them, my Firefox died a lot at this time!). When I started to do more, with a bigger goal, I just kept all I did previously.

I started to do a canvas version for a weekend, but at the end it wasn't worth it, the editor and the game were too far to step back!

Again, thanks for your feedback!