While building this game, we learned about separating game logic from graphics. This makes it easier to edit specific parts of the game. A simple Scratch game is often made by a single person. But in a professional game development studio, many different people will work on different parts of a game. In those circumstances, it's very useful if each part can be developed separately without seriously breaking the game as a whole.

We explored some options to create better graphics both with the Scratch tools and with other image editors. We only scratched the surface though; this is a subject worthy of a separate book.

We also created a simple form of a multiplayer game. Games are always more enjoyable if you can share them with a friend. Perhaps you noticed how the game experience changed when you added the second player and started testing the game together with someone else. If you haven't done that yet, I strongly encourage you to do so.