Seems like a tech question to me...
Since it seems like you'll have to use a separate region and walkable area for the bit where the steps appear, I would draw them on the background and cover them up with an object (which you can perhaps also use to do the animation of the falling stalactite). That way you'll have an easier time knowing where to draw the regions and areas.
Since it seems like you'll have to use a separate region and walkable area for the bit where the steps appear, I would draw them on the background and cover them up with an object (which you can perhaps also use to do the animation of the falling stalactite). That way you'll have an easier time knowing where to draw the regions and areas.