In this project, you have learned how to take advantage of Godot's inheritance system to organize and share code between different objects in your game. This is a very powerful tool that you should keep in mind whenever you start building a new game. If you start making multiple objects that repeat the same properties and/or code, you should probably stop and think about what you're doing. Ask yourself: can I use inheritance here to share what these objects have in common? In a bigger game with many more objects, this can save you a large amount of time.
You saw how the TileMap node works and how it allows you to quickly design maps and spawn new objects. They have many uses across many game genres. As you'll see later in this book, TileMaps are also ideal for designing platform game levels as well.
You were also introduced to the AutoLoad feature, which...