You never have ownership of a game, in the sense that you're an authority, as if you own a stake in a company. When you buy a game, you simply have some permission to play the game. You have better control of this permission when you own a physical copy of a game, however. If your game sits...
You can add platform character behavior to any sprite, just disable the default controls for it, and make it jump/move in your code. The rectangle behavior is cool too for enemies.
Yea it does. And you can add platform character behavior to your own charcter, and it will have move and jump already setup for you, space bar is jump, arrows move