If you use web workers, you have to use more than one file. You have to use a web server (it doesn't work from filesystem). Web workers also don't have support in older browsers. From web workers you can't touch DOM.
-- Fri Dec 27, 2013 11:02 am --
I've changed MOOPH a little (window.performance.now() + fallback to new Date().getTime()).
-- Sun Jan 05, 2014 12:57 pm --
I've changed MOOPH again. I use .call now for better object oriented programming. I also changed examples. All features of MOOPH are covered now.