This chapter covered a lot of in-depth topics around the concept of the actions that can be applied to nodes. These actions allow the properties of a node to be manipulated; although these were not implemented within the game, they are still important. Here is a little task: implement some of the actions in the game, such as making the asteroids rotate or even scale. Experiment and see what can be achieved using these actions. Until now, the game has no gameplay interaction, but in the next chapter, touch controls will be implemented to provide the user with the functionality to move the space pod.