Thanks for your answers but I realise my explaination wasn't very clear ...
Ashley : I'm exporting with cocoonJS on Android.
Newt : I can't put the file directly in the project as the game customization would be handled by non tech savvy people :(
In fact i want the people from the museum (not programmers) to be able to modifiy the game graphic assets without opening C2 or making an APK.
They would be able to modify XML files and put them in a folder on the tab in order to change the game logo, backgrounds and call different game assets that are linked to their current exposition (the assets would be on the tab as well).
To sum up, I'm making some kind of customizable matching game engine for them, so they can adapt the games to whatever ancient civilization they are exposing.
It wouldn't be a problem if they had rock solid wifi in the whole building as I have built a prototype that requests XML and assets from a web server but they asked me if it could be done directly from the tab and I'm not sure that it's possible.
Is it ?