The plugin was originally released in August of 2013. It hasn’t seen much for updates, the most recent was in January 2014 and was a simple change to the README to include a license.
Searched on codepen.io quick to see if I could find anything using this plugin. One pen, Long Shadow Icon Prototype, looks to be using the plugin. It was created about the same time that the plugin was pushed to GitHub.
I haven’t used this yet, but the demo is super simple and looks really easy to use. Looking forward to playing around with it.
Detailed usage instructions and other customization options can be found on GitHub.