Palace of Darkness for sure. I had to backtrack so many times, died so many times, and had to leave so many times. It's nice they made a lantern based dungeon and all, but I feel that it was quite, how do you say, unnecessary. It feels as if they traded the boomerang for the lantern. The worst part is that they actually shoehorned the boomerang in. It stuck out like a sore thumb. No use at all. I feel the only place it could have been intergrated is in the Palace of Darkness. Maybe using the boomerang to light torches in a DS-esque style but having to light a few torches with the lantern beforehand or even better, a boomerang-lantern hybrid would be cool.