accessible html 5 game

Hi.

A totally blind it student studying computer  at http://www.upskilled.edu.au

And now need to create a accessible html 5 game.

Looking at doing the classic 2 d shooter space invaders.

Using a engine called Quintus, http://www.html5quintus.com

Now.

How to make screen readers able to read content in the canvas.

Or any other tips, tricks, techniques for getting me started.

A sighted friend is doing images, recording audio clips, and background
music, and using the free gpl licence for copyright.

So using jaws for windows and nvda on a Toshiba satellite pro c-50-a running
windows 8.1 64 bit enteprrise.

Have gone through the learning amterials, and then the tutorial how to use
the engine.

So, is there a more accessible game engine.

Thanks.