C2 multiplayer plugin relies on WebRTC.
As you can see in this chart several browser on mobile do actually support it.
So you can export your game as website and ask you players to use specific browser on their mobiles to use the game.
Moreover, thanks to the condition "Supports multiplayer", you can "lock" the execution yourself if the browser used doesn't support the multiplayer feature and let your player know they should use a different browser.
Intel XDK (CrossWalk) relies on a Chrome base, so in the absolute an APK made with it should handle webRTC and so multiplayer.
I'm afraid I don't understand your question about "objects".