Do margins effect the way the layout is displayed on a mobile device as at the moment I have been exporting using cocoonjs and crosswalk to test and they both come out perfectly height wise but on the width there is a 1cm gap line on the right side of screen where u can see the goings on behind the game level.
my margins are set to H- 500, W- 500
My layout size is 1024 - 576, I set it to this so it is 16:9 ratio to hopefully support more screen sizes.