In this chapter, you deepened your knowledge about items, about the scene, and about the view. While developing the game, you became familiar with different approaches of how to animate items, and you were taught how to detect collisions. As an advanced topic, you were introduced to parallax scrolling.
After having completed the two chapters describing Graphics View, you should now know almost everything about it. You are able to create complete custom items, you can alter or extend standard items, and with the information about the level of detail, you even have the power to alter an item's appearance, depending on its zoom level. You can transform items and the scene, and you can animate items and thus the entire scene.
Furthermore, as you saw while developing the game, your skills are good enough to develop a jump-and-run game with parallax scrolling, as it is...