A spooky dungeon, indeed, filled with spooky monsters, not so spooky shrines, less spooky wells and extra spooky bosses!
A glitch happened where a battle was 'supposed' to happen on floor 2, but no enemy showed up and the battle music kept on playing for a while. This happened several times during a playthrough.
At one point, I was sitting on -13/15 EXP for the next level.