I suggest clearing your Ram memory before every game as well... I can tell you are running too much at once because the graphics and shapes are crap..Clear memory and re boot game you will see a huge difference in Graphic quality
DO you have an android tab? ..... I just use Task Manager option and then clear un used Memory..it honestly Makes A HUGE difference!
Click the arrow at the bottom!............ Then it should come up as "Task Manager" ..Then Clear Memeory and ur set!