I recorded World 7 just minutes ago, but I actually managed to use one more save state than I did the last time... I don't like saving inside of stages, so I hope that when, by some lucky chance, that someone watches my videos, they won't judge me for using save states in between stages.
Anyway, this is my second favorite world in the game! Only one, evil, evil, EVIL world to go! Why is it so evil, you wonder? It's because the boss at the end of each level in World 8 is not only deadly, but as you progress through the 8 levels of World 8, it becomes harder and harder to defeat the boss due to the way the fight area is set up.