The one thing I really don't like about this game, is when you know you can 1-hit KO the next boss, but have to sit through 4 boring stages before you can challenge it.
The fitness room is annoying (what's wrong with just clicking '+' to upgrade?), the dressing room got way to complicated/is not clear enough (even scrolling is difficult) and the fights take to long.
You not need upgrade Kittens in fitness room after each level. Just got many fishes, then upgrade. Dressing room now very convenient compared with the first part. The game has a huge number of costumes. Arrange them was very difficult. But sorting through the levels - the easiest and most convenient way for you. If you need a Set with a certain skill, to sorting by skills.
I know of no greater horror, if I saw a a shark coming at me with a stapler I'd run.