Candlestick is a very annoying level and it is really difficult, plus its not worth playing it so i usually wait for the level to change.
Treasure Boxes:
Add treasureboxes at the end. There are levels that have treasure boxes at the end and they are not even difficult. Concrete Jungles are very fun to play they are easy in my opinion and they also have treasure boxes at the end. So we get cool stuff for doing an easy level but not for doing the most annoying one. Plus the treasure boxes that you find in candlestick are in dead ends with no candles, just to be eaten by the grimalkins.
Grimalkins
We should be able to shield their attacks. They are supossed to be difficult but not that difficult. We should block their attacks at least one time like we do with the missiles at Ironclaw, you cant take 2 missiles without your shield breaking, something like that.
Cows
When someone says the word ghost, the first thing that comes to my mind is cows. I was surprised the first time i did a graveyard and i saw no cows, then when I heard you were adding candlestick i though there would be cows there but again i was wrong. It makes no sense to have ghosts in the game without cows. Add cows please.
Fire Orbs
Fire orbs should have a use other than light candles. When you hit something else they work just like a jar, they just break and if you hit an enemy they do little damage. I say that when you throw a fire orb to either a wall, an enemy or any object they should do something like the animation when you light a candle but just that and not lasting. That way you could have some kind of protection when you carry an orb. So when they hit something they expel a radius of light but the light doesnt stay.
Owlite Temple
This isnt directly related to the candlestick keep levels. Candlestick keep have an interesting mechanic. Every boss we have does either piercing or elemental damage so we need one that deals shadow damage. The levels previous to the boss room could be called the Owlite temple, they could be similar to the candlestick keep and the boss can be some kind of Cow Kat hybrid.
I think of cows when someone says milk, not ghost.