Doesnt run smooth

The game would be cool, if it was running smoothly. I have huge framedrops and then I always crash my car. I would really like to play this game if it didnt have such a bad performance. Might be that my phone is a little bit of a problem, because its quite old already. But on the page it said 4s is supported. Well, apparently its not. (iPhone 4s, iOS 9.2.1)

klaamue about Thumb Drift - Furious Racing, v1.0.3