Oh, have you tried the game several times, or just once? For me, the cat is one of the easiest bosses (even if it's hard to hit when it's vulnerable). And people generally find themselves in more difficulty against the fish or the face. But as the order of the bosses is random, they get harder and harder depending on the order in which they appear. If the cat appears first, it would be pretty straightforward; if it appears last, it would be much tougher!
Anyway, thank you very much for your comment :D