What happens next?

How to get a high score on subway surfers
Build up your multiplier.
The best way to get a higher score quicker is to improve your multiplier. When you first begin playing, your multiplier will be set at x1.
Every time you beat a set of missions, you will level up, and your multiplier will permanently increase by one, up to x30. This means that your score will be 30 times what it would normally be if you have a full multiplier.