Mobile devices are limited in comparison to desktop browsers or native apps in resources. I've noticed quiet a lot of times that if your games get's a little bit more complicated in update-processes, physics etc that the performance is lacking on mobile devices. Even as a result there are as more errors in the physics etc as your game-performance is limited. So maybe it is useful to compare how to improve performance. 1. Update function In my code I strongly try write as less code into the upd