Kerb The street is a modern day twist to the game curby that is played by many children in the U.K. The objective of the game is simple to throw pieces of kerb from one side to the other by tapping on the screen to create a kerb on one side avoiding the cars as you go.The more kerb that is created the higher your score will be. You can also use one of the many in- app purchases to help you create more kerb. For example, the ability to slow down cars or earn extra lives in the same game.