Really good overall except for the crushing audio, especially in fullscreen mode. Otherwise, I see this becoming the next cookie clicker! (with its own style and twist obviously).
As an idea, I'd liked an autofeeder, maybe as a progression after using the cat feature for a while, but maybe that's too idle for what you wanted to achieve. The cat was really cute and a well-balanced mechanic too.
The end was so fast I didn't fully get it but in the page it sounds like it's something big, maybe I missed something important?