Snake is my starting point for regular coding. I examined the design of the game from the source code and refactored the code for better reading. Familiarity of javascript improved.

Try it live. (This link works because I cloned my snake project as a submodule of the repo of my site, this is not really convenient. Thanks to rawgit.com, I can refer to my repo directly now like this. I tend to use the dev/test version of it.)