Unity Endless Runner Tutorial #6 - Background Music and Other Improvements

Original Tutorial
http://catlikecoding.com/unity/tutorials/runner/

My version of the game (Version Log)
http://www.hansadrian.com/Stuff/Endless%20Runner%20Tutorial/build.html

GitHub Gist (for full code files)
https://gist.github.com/HansNewbie/10005219/0bdb11657b44c17a8f5b17fc32d1f11d47ff1b62

Completed Project Files (V0.6.1)
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For version 0.6, I added simple background music. As I was thinking it could be improved, I made V0.6.1 where you can toggle the music on or off, as well as added background for high score to make it readable.

GitHub Project Page on Subdomain of GitHub User Page

I have  been wondering on how to put GitHub Project Page into subdomain of my GitHub User Page as no detailed instructions can be found around. In case you don't understand what I want to achieve, say I already have my GitHub User Page (hansnewbie.github.io) to use custom domain to hansadrian.com (you should follow the guide at http://davidensinger.com/2013/03/setting-the-dns-for-github-pages-on-namecheap/ - I am using Namecheap since it is cheap, as the name suggests). Now, I would like my GitHub Blog Project Page (hansnewbie.github.io/blog) - which is automatically redirected to hansadrian.com/blog - to use custom subdomain of blog.hansadrian.com.