I think this a really cute and fun idea. I enjoyed my time with the cats. If you want to do more with this game then I think you should. My favorite part of the game was decorating the island.

This game is pretty adorable, I like the concept. I kind of got bored after like ten cats or so, I think if there were more things to buy and more ways to decorate I'd have wanted to play for longer. I think if you want to keep going you could make more to do! Bonus points that there was a cat named Light Yagami

Hello! Very cute game so far! My suggestions would be:

1. Animation for working cats so it's more clear that they're doing something
2. Status bars such as motivation, hunger, fatigue etc. Is a cat's motivation is high, maybe it makes money twice as fast. If low, it'll be slower or maybe even refuse to work at all until it's fed or has playtime, stuff like that.
3. Not sure if coffee already does this as I haven't gotten the coffee yet, but maybe it could give a burst of motivation for a few seconds, followed by a crash where the cat is slower to make money for another few seconds before going back to normal. Perhaps one of the upgrades for the cats would be a better caffeine tolerance with longer burst of energy and shorter crashes.
4. Making it possible to deselect a cat. The white frame always seems to be on one of the cats at all times and I keep accidentally moving the cats away from the computer when clicking around or placing decorations.

Keep up the good work and good luck with the game!