Very cool idea and use of the theme! It's very fun, and I love the artwork! It's also a pretty good idea to have the boss heal after a little while, so that you have to hit the boss at the perfect time. I really like the mechanics and bouncing off the walls. It's also really nice that you put visual cues to the health of the player, and clues when the cat's paws get stuck. Would love to see an expanded version of this game, with more bosses! :D