I have hit a wall with the canvas game tutorial. I have been over the code multiple times and can not find a coding error but when I got to adding sound effect the game starting slowing to a crawl. When I inspected the code I get a number of issue and error starting with cross origin requests only supported for HTTP. referring to audio.js

Then the game continues to throw XMLHhttp requests can not load all referring to calls to new Howl code for shoot, damageTaken, explode, death and powerUpNoise.

Any advice is appreciated