I have a daily quest to use 10 boosts, but I can't figure out what that means. How do I use a boost?
When you choose the runner you want click on menu Up in the top left corner there is an emblem probably a gem. Click on it then choose boost. When you play any of the places on your map watch the top left corner of the screen. When it turns all green double tap anywhere on your screen and your runner will speed off by itself. That’s a boost.