Technical requirements
As this chapter is a continuation of the previous one, it assumes that you have completed and are comfortable with the information provided in the last chapter, specifically how to create a new script and add it to an object as a component, and creating prefabs from objects in the scene.
The project so far can be found in the book's companion files in the Chapter04/Start
folder. You can start there and follow along with this chapter if you don't have your own project already. If you want to test the final game, you can find the completed project in the Chapter04/End
folder.