I, too, agree with the previous comments. The opening was AMAZING with all of its twists, turns, and humor. But as others have pointed out (and you already know), the end boss is the weak point of this game. I played the Windows version and also had problems with the items in the end (it actually looks like they damaged me?).
I may come back to this once you've patched it because there are great things going on in here, like switching between fantasy and sci-fi worlds. I thought the deliberately bad mapping in the south town was genius. It's a really amusing game, and I'm sure it will be thoroughly enjoyable once the end boss has been balanced out.