You may well have played Super Metroid. But when you did, you played it the way Nintendo wanted you to play it.
This hack, by SMILEuser96, flips the game's map on its side, but leaves Samus and your enemies properly oriented (so only the level is tilted, not your entire view).
Sounds simple, but it completely changes the way you approach the game, since the intended routes to doors and through rooms have now been flipped. Hope you're good at wall-jumps, because you're gonna need 'em.
If you want to try it out you can get it here; there are a few spots where you can still get stuck, but for the most part it's not just playable, but beatable.