Nice parallax effect :-). 

Anyway, do you know how to use git and GitHub?  By making commits and pushing your work to a remote repository you not only have it safely stored, but also you can revert to a previous commit if you mess it up, or create experimental branches without touching the "main line of work".
Git is something every developer needs to know, and fortunately, it's very simple (that's the beauty of it). See this tutorial:

Good parallax effect though ;)