I'd like to throw my $0.2 in the HTML5 discussion as well. I think it's great. Don't get me wrong, I'd like an exe exporter too, and I'm pretty sure there will be one so I'm not fretting about it. C2 is still in an early stage and we should expect to not see a particular feature we want right now, not the other way around.
The way I see it, going for HTML5 opens up for a lot of cool new things we can do. Like network code for instance, which as far as I can tell was a real hassle on 0.X. With HTML5 and Javascript at its core such things will (probably) become much less of a hassle (though network coding is never easy)
Let's face it, HTML5 might be the architecture of first choice in 5 years - but I need something I can work with now...
Then use a program that is not in such an early stage. It's just that simple. 0.X didn't somehow just disappear just because we're trying out an early build of C2.
I remember seeing the link to this game here on the forums a pretty long time ago.
http://playbiolab.com/
Edit: saw just now that scidave linked to that engine right above my post.