I've been spending very little (almost no) time making my games work well in HTML5 because the other targets all seem to work better, and I can get my game on any platform.
I don't see why I'd want my game to work in HTML5. For 1, the source is basically open. 2, it seems to run differently in every single browser, so it's like adding ANOTHER slug of platforms I have to be compatible with.
Why are you using HTML5?