Get game to show up in on a normal HTML page

This change makes it so that if you open `game.html` in a browser the game will show up.  I didn't do proper indenting in the `1` file because it makes it look like I changed more than I did.  The green lines are lines that I added, and the red lines are lines I removed.

I think this change basically just duplicates the framework that Khan Academy has set up for you.