What about all the cool menu interfaces, and all the gameplay interface to buy/sell towers that the book promised? Well, don't you think we have learned a lot in this chapter?

In fact, this chapter provided a lot of information about UIs, and I suggest you take your time to get familiar with all the concepts, as well as doing the exercises in the next section. Then, we will come back to implementing all of this when we will build the gameplay in Chapter 5, The Secret Ingredient Is a Dash of Physics.