The game looks, sounds and feels amazing. The idea is interesting and pretty fun. But the game really needs a tutorial, and it was not very clear if there was a goal.
I also think there is a bug where you put the cat to sleep, because after I have had a cat sleeping there I ´was not able to get any other cats to sleep there again. I know I tried to make other cats sleep on the sleeping spot when the cat slept there, and this might have made some kind of issue with the sleeping sport.
The icons over the cats that shall tell the player what the cat wanted/needs was not clear enough for me to just know what they meant. And I did not know where the cats need to go to sleep or where they need to go get fed.
You call it upgrades, but what it really does is to add more sports for sleeping and feeding, and it does not make the sleeping or eating better or faster in any way.
For me at least the difficulty was too high, and with the rest of the games very relaxing atmosphere I would have wished the gameplay was much easier and more relaxed.
Overall is this a good idea, and atmosphere alone makes the game worth playing, but like most other jam games is there room for improvement. But you have made a good jam game, and the game is so good that I also would have liked playing it it, even if it was not a jam game. So well done and thank you for sharing your game with us all.