I really like the concept of cute kitten unleashing hell on enemies and I think the art style adds to this idea really nicely. I would suggest however remapping the keybinds for killing and drinking to the same key, one that's easier to access (perhaps space). This way there isn't a clutter of keys the player has to manoeuvre their hands across the keyboard to press, and you'd have one key that is associated with killing/activation of killing.