Rayek, if you are just making it for iOS, why not use Ejecta? It works great, and is fairly easy to get working. There is a tutorial for it.
I've tried that before - however, I could not get it to compile in xcode. A simple test did work initially. I have read there are issues with tiled backgrounds as well (which are used quite a lot in the game).
Today I tested the game in the Cocoonjs launcher on an ipad 2 with the latest iOs release: the result was quite sobering indeed. It crashes while it loads or crashed in the menu, or when starting the first level. We tried about 6 times, and the game would crash at random - never reached the point of actually playing the game.
In iOs 6.1 on an identical iPad2 and the Cocoonjs launcher there were no problems whatsoever - it at least played smoothly with no crashes at all!
Either Cocoonjs launcher has issues with the latest iOs, or the memory requirements are heftier... Not too sure.
Is anyone else having issues with the Cocoonjs launcher and the latest iOs?