In the Lick Runner game you have to complete each level and run through the whole track with your tongue. You need a fast reaction to tap timely and lick only edible objects and roll up your tongue to avoid any not edible objects on your way. If you lick them, you will get sick and slower, so you will have more chances to lose to your opponent. But to get through the level faster, you can boost your hero by eating a huge cake. In this case, for some time, you will be able to eat everything and move much faster to the finish line.