Y'know everyone's rambling about native exporters but do they have any idea what they're asking?
A native Windows export would be great, sure, but it's 2015, man. You think that's going to cut it? Hell no.
There's Windows, Mac, Linux, Android, iOS, PS4, PS Vita, XBone, WiiU, 3DS, and Browsers... And those are just the big platforms of today. What's going to be out there 5 years from now? Many of these platforms might even be obsolete by the time Scirra finished making exporters for them!
Better yet, take a look at Unity's native exporters
BLAM
Most game engines couldn't compete with that if they wanted! Scirra included. So they stick with HTML5...and you can't say C2 isn't the best HTML5 game engine out there.