You know, it USED to be "Super Hunchback" for the original Game Boy. The game is extremely difficult, largely because they've adjusted the physics so your character controls like an unresponsive slug. Probably not as bad as some of the worst in the list, but it was the worst one I had.

I probably now have worse stinkers in my Steam library, too, but that's a different matter. Lots and lots of shovelware on that platform that sells for $.50 or gets thrown into some random Humble Bundle...one reason why I stopped buying Humble Bundles - they're mostly filled with trash these days.