This is a somewhat minor question, and kudos to anyone who knows the quest well enough to answer it. But on Level 2 (the desert themed dungeon), there's a room with a walkway enclosed by blocks, and a bunch of bats. Once you kill the bats with you sword/boomerang, a piece of heart appears outside of the enclosed walkway, so there's no way to get it. Does anyone know how to get it? I thought there might be a secret passageway that takes you to that room, only outside of the enclosed blocks..but I couldn't find one.