Space Blaster has already been ported to Ejecta: youtube.com/watch (http://www.scirra.com/forum/experiment-construct2-with-ejecta-and-gamecenter_topic64187.html).
Game Closure seems far too complicated, Ejecta is working right now, with Game Center, iAP and WebGL. It works like Phone Gap and it's very very easy to extend with native code.
I firmly believe that as today the ONLY option to export professional games on iOS (with C2 of course) is Ejecta. Even if CocoonJS supported Game Center Leaderboards and Achievement (and it still doesn't), even if iAP purchases worked (which apparently they do not) there is still the issue of the forced CocoonJS logo before your game.
Anyway let's try to keep this thread on topic, posting example of games, issues and so on.
jayderyu yes it is but I'm not the original author, I'm expanding it with iAP purchases and whatever might come down to road to make it a complete Ejecta Plugin. I'll publish on GitHub so anybody can contribute.