How Do You Make a Game Like V?

V is a game, i think, one of the first games that i know of, where you could flip gravity it and your character would basicly fall in the opposite direction. The big twist for me, that i still bring up to my students these days, is you can't do it in mid flight. And that makes such a big difference. But then, oke, so you have this beautiful mechanic, you can make individual puzzles and screens, but for some reason then you decide that that's not enough,. And so you're going to make it this metroid style. There are you can also fall all the way from one part of the world whole other parts of the world