I was thinking about cat points.
Cat points. Cat. Cats. What are the cats in the game?
And then I had an idea. Yes.
Killing Pumpkin should give 1 cat point, as well as an immortal revengeful cat ghost that sometimes appears at most inconvenient moments in the heat of a combat to exact revenge at you. And disappears once the combat ends.

*haunting, chilling meows of a wronged cat from beyond the grave*