for everyone asking for native export:
There is an open source clone of construct2 that sort of does it already. Given it doesnt have such huge community , features and polish - it's event editor is extremely similar.
The stable version compiles to windows, linux, mac (native) and html5 (with support for android and ios via xdk)
In fact they are already testing android native export for the next version:
But the thing needs a lot of work to get as stable and powerful as construct2 and they dont get the funding that scirra has.
And unlike construct they are using other open source engines to do the actual work - sfml(for desktop native and soon android native) and atm adopting cocos2d (to do andoid native and html5 in the future).
Construct2 has it's own engine if I am not mistaken.