I know there was something sorta like a heart in DK II, although is was mostly in a pit of sorts and was a round thingy that beats. (Although it has a small "temple" of sorts for it, I thought that was nice)
I take it that you want to take the concept further, making it even more a "heart" that has more visibility than being in some pit?
Works for me.









And the Dungeon Heart room's floor looking vainy sounds nice.







