@drscott - search the crypts in the first graveyard. Also, post if you find any secrets (without spoilers) - there's an oversized statue near the entrance to the second graveyard area that you can move inside.
@Ichthyic - you need to find the wooden cross on the way to the house - the quest is to help him vanquish the skeletons from the graveyard. Unfortunately they're still there, but you get a perk for it :/
Half the trick is figuring out which path between two sideways-triggered arrows will lead you through and not trigger the minuses/ up-down triggered arrows. Once you get that, the last 5 levels are a breeze. Lv 19 is the hardest :D