In this chapter, we are going to finish our second project. Here, you will learn about the final tools and scripts you need to finish this awesome space-shooter on your own. In fact, at the end of the chapter, you will find a series of exercises to completely finish the game, and also some ideas on how you can iterate on the design and development of the game. I warmly suggest you try to experiment since it's the best way to learn. After that, you can jump into the last but also most challenging game of this book.

Here are the topics we are going to cover in this chapter:

• Building the UI for our game, with a particular focus on creating a lives counter.
• How to create an infinite scrolling map. This includes a scrolling background as well as falling objects and orbiting satellites.
• Including power-ups by modifying the collection system in Angel Cakes.
• Creating a spawning a system to generate both enemies and decorations.
• Testing the game.
• Exercises to improve your skills and further ideas on how to develop your game.

Once you are ready, let's start by including a lives counter for our player.