This is such a cute little game, the art style is wonderful and cohesive, the music and sound effects are fun and of course, playing it is fun as well.
I do fear that the cats don't stand out enough from their environment for people with colout blindness. Maybe an outline or a different value would work well. The ball changing colour is sometimes not clear due to the same reason.
Should you work more on this over time, it would be fun to see different environments added.
I can't get over the lil running animation, it is so cute.
good job meows!