In this chapter, you learned about a new object, the tiled background, and how to use it. You learned about a new Solid behavior and how to use it to bounce off objects. You also learned about expressions, how to use them, and how to compare them like instance variables. You learned about constant variables and how to use them to change the state of an object. Moreover, you also learned about sub-events for the first time.

In our next chapter, I will introduce you to the Physics object and a few things you can make with it.