Note! This information is not relevant if you are using Gluon Creator to build games.
If you wish to use the libraries without using Gluon Creator, you are more than welcome to do so. To find the information on how to do this, please visit api documentation on http://api.kde.org/playground-api/games-apidocs/gluon/html/index.html to see this. The source code download also includes a couple of examples, in the examples directory found in each of the various library directories.