just running it from a browser on my phone.
It was running all the physics objects and everything perfectly well until I added the large backgrounds.
There is 4 background layers with parallax that when i take out the project runs well again. Tiled backgrounds sized at 1600x1200
And yea the physics object contributes to the lag but it is the player and the ground so not much I can do about that. Without the backgrounds it doesnt lag really.
EDIT: Tried using CocoonJS to speed it up and hopefully resolve the issue.
All I get is a black screen when launching my app. Tried local preview and exporting to cocoonjs and using the zip; both give me just a blank black screen (with an fps meter)