Audio not working on iPad

I have been experimenting with converting some Flash animations to JavaScript with Flash CC, and so far I am impressed!

One issue I'm having is that the audio plays correctly in the desktop browser, but the audio does not play on the iPad.

Any ideas? Here's a link to one:

http://dev.riverrockcreative.com/clients/hwt/keyboarding/JavaScript_te sting/forkliftJS/forklift.html