In this chapter, you learned how to respond to a variety of inputs from the user. You also learned how to detect touches on the screen and how to use these touches to change properties of your nodes. You also learned how to use form elements to accept other types of inputs from users.
In the next chapter, you will learn all about how to use physics in your app. Physics will be used with both SpriteBuilder and code. You will also create an interactive physics-based game to learn these concepts.