I don't know what it is but I have this continuous urge to climb higher and higher. In my mansion, I think only the ceiling is the limit, and I'm approaching that limit bit by bit. I found a way to reach the ceiling, but it's a bit trickier than I thought.
See? There isn't much left to the ceiling, but the post I'm trying to climb here, is very challenging. I just can't get my claws to sink in it properly. Any tips?