Nice!
I feel like adding progression would really make this game less stressful- it starts out fun, which is a great sign, but when the number of duties increases while your capacity to complete them stays the same, you get much less fun out of the experience.
Maybe adding an upgrade system for the duties, like increasing the number of food dishes, or the number of times a cat can use the litterbox, or a computer upgrade that automatically orders up food every once in a while (as well as the usual speed upgrades, etc.) could help thwart the growing pile of chores and make you feel like you can accomplish even an insane number of cats!
Good luck though, I gave this 5 stars for presentation because the style is so charming and cohesive. Good luck with your week!