Fun! Besides the obvious stuff (animate player, monsters, etc.), consider having the treasures move towards the player to get picked up instead of just being instantly collected when player gets in range.
Also, the Flaming Aura spell was definitely over powered for me. Maybe a bug but it came on and stayed on. After upgrading it and magnet range a few times, I could just sit in place and let the monsters kill themselves on the aura and collect their treasure without moving.