to improve peformace, I've updated each file with the changes for the main.js, I only made a few changes Put a cache control on the file to use a local copy of the file for 600 secs minified the .css files put async in front of the google anylytics line added my data and image to the page.
for the index.html Modified a couple area moved mutliple functions outside their loops, to improve performance shrunk the pizza and pizzeria images http://jpeg-optimizer.com/ using tinypng.com website
Under updateposition, I've tried a couple different approaches and rem out what I didn't use. changed how the randow pizza appear.
Websites,
Github.com //jpeg-optimizer.com/ using tinypng.com website http://www.webpagetest.org/ http://cssminify.com/