Adding a simple header/paragraph to index.html?

I got a small prototype that I just want to add the controls for within the HTML file itself and looking at the HTML code, I have no idea how to do it. Maybe the text is appearing behind the game because it takes up the whole webpage but I don't know how to change that either.

https://dl.dropboxusercontent.com/u/728 ... index.html

The file is here. I'm just wondering what I need to do to add a paragraph at the top. Doesn't have to be fancy.

If anyone could help me out it would be super greatly appreciated. And if you want to play you need a controller.

I wrote a tutorial on how to customize the exported html file years ago.

Hopefully it should contain all the informations you need.