I originally bought C2 to make interactive animations for www and small www games. it's the perfect tool for that.
after 2 years, it's now in a good state where you can convert your html game to make it a desktop exe. i don't like the useless overhead in exe size and the fact that you cannot load/unload assets with C2 commands, but it kind of works.
however for anything beyond whack a mole, for mobile, native code is still the best option for now. i keep checking every few months for any progress in 3rd party technology, but we are still a few years away from having good html5 wrappers that can cater for games with some action