You could try Paper.js. If you use this, make sure to use Symbols instead of Path or Rectangle objects, otherwise you will run into performance issues quickly.

You could try Paper.js. If you use this, make sure to use Symbols instead of Path or Rectangle objects, otherwise you will run into performance issues quickly. There is an online editor at http://sketch.paperjs.org http://sketch.paperjs.org which is nice to play around with.