Ok, this is getting a little ridiculous. So if you (OP) were playing Super Mario Bros, the last world should be unlocked as soon as you turn on the game. You only ever learned how to jump a Goomba and would rather not have to figure out Flying Koopas, but feel that Bowser should be defeated by jumping on him once while he stands still... "Fireballs too difficult IMO! Jumping at the RIGHT time? Asking too much." The Hammer Bros must have absolutely eaten your lunch as a child.

Almost EVERY game in existence requires you to learn something and apply that skill to advance within the game (even if it's as simple as moving out of the fancy glowing area on the floor). If you don't want to be challenged at all, go watch TV.