It creates a 3D-ish view to the player. Just try it yourself
No problem! I hope you can make something with this little trick! But one thing: It gets really slow and will cause your game to lag if you have too many objects in your room. So you should only render the objects which the player can actually see. For example, test if the object is inside your view, if it is, render, if not, then not. Thanks so much for your attention :)