You can retrieve the code as you can for any other Git repository. This is just a basic application skeleton source code committed as an initial commit, as shown in the following screenshot:
You may not be experienced in using Git as the source code management tool, but don't worry too much. Using your favorite IDE, you can make the best use of the assistance wizard to access the repository and retrieve the code. Anyway, this may be a good opportunity for you to learn using Git, and then you'll hardly use another tool.
The application generated by ClickStart is very basic and doesn't offer an advanced UI design but just demonstrates a working codebase, as shown in the following screenshot:
You can now customize the skeleton source code to demonstrate your developer's skill and convert this basic application into an awesome UI with great features and services.