I work on Shumway, and we would love to get more complex Flash games running. Would you and your company like to help our team get these games running? Performance is a hit or miss, sometimes we can be really fast, sometimes really slow, it all depends on either:

1. We haven't implemented some feature well enough. 2. We can't implement a feature in JavaScript/HTML5 and we have to emulate it in a very slow way. In these cases, we can either improve the Web Platform to support these features natively, or work with various game developers to avoid using them.