feeling like a complete newbie, but I can't figure out how to download the source code for this project on Google Code: https://code.google.com/p/xlarge-demos/source/browse/
Please let me know how, maybe a program, or a site that does it, anything works,
If the project doesn't provide a packaged download (and it seems that it doesn't), you need to use a version management system (command-line tool or in an IDE) to check out the code.
In this case, this would be Subversion. The Checkout section on the Google Code page shows which command you need to use on the command-line, and a link to installation instructions for Subversion on various platforms.