Please take a look at the demo pages but these might be slow. In addition please be sure to use Chrome when trying the demos.
There are restrictions to access the canvas data when you're loading the index.html from a local place.
If you've got python installed, simply download the files, change to the directory and run
python -m SimpleHTTPServer
Afterwards you're able to load the demo in your browser at http://localhost:8000/
For the full tutorial, please take a look at my blog.
2012 Micha Kops / www.hascode.com