This subproject is the source code of the AngularFaces and BootsFaces Tetris demo which is installed at https://www.angularfaces.net/tetris and http://www.bootsfaces.net/AngularTetrisOnBootsFaces/.
To learn more about AngularFaces, have a look at https://www.angularFaces.net and http://www.beyondjava.net/blog/angularfaces-jsf-beyond-ajax/.
There's also a showcase at http://showcase.angularfaces.com demonstrating the older version of AngularFaces 1.0.
Legal disclaimer: As stated in the Licence conditions, the software is provided on a "as is" basis, without warranties or conditions of any kind. Use at own risk. Read the license file for the details.