Twice I have seen items appearing on/in walls. One was a rare card, when working on the L10 rat dungeon. It remained over several attempts, and at least one re-visit after the level was cleared. The other was a Guardian Sword in the Bastion (not at home so don't have the device with my game on it). ...

Loving the hell out of this game. Just saying. May even work up a small guide for beginners, as it took me a LONG time to catch on to some things. Last night I finally cleared the Lord, and received the red-bordered shrunken head item that teleports you back to "Dad." I already had two key...