Amazing game!
I am fond of the art style of the cat. The drawing style works perfectly. The overall design works perfectly, and the dialogues are a very nice touch. Also, the upgrades are well-thought, and they all add something to the gameplay. This is a big achievement for the small amount of time you had for the game.
There is not much to say about what you could do to improve the game (aside for classic, more enemies/levels), but I would say that the enemy feedback could be a little bit more punchy. Adding a more sound design when touched, scaling, or ticking the enemy could do the trick. For now, I feel a little weak when attacking enemies.
Good job!