Case-sensitivity issues

[NoseyNick]

You have some issues with case-sensitivity - which will work on Windows but fail on almost any other OS.
EG script type="text/javascript" src="js/three.js" when the file is clearly called js/Three.js
Would be happy to help fix, but would you prefer to fix the JS/HTML, or rename the files?

[quantsini]

I'm not opinionated on this casing; feel free to do what you think is appropriate :).