Since the usage of a physics engine has its own particularities such as the units and game loop, we have learned how to deal with them. Finally, we learned how to pair Box2D with SFML, integrate our fresh knowledge to our existing Tetris project, and build a new funny game.

In the next chapter, we will learn how to add a user interface to our game in order to interact with the user easily, by creating our own game user interface or by using an existing one.