From the very beginning, you start with just a regular round cat. Taking over the world (literally, the levels have the names of countries) you will open more and more new units and provoke the wrath of more and more powerful enemies. A brick cat or a cow cat may seem strange to you, but as you progress further, you will discover insane all-destroying maniac cats with burning eyes, dragons and anime characters (the game is still Japanese).
There is a place here and grind. If you get stuck somewhere, you will either have to tear your vocal cords by endlessly losing, or watch a couple of thousand commercials to get a hyper-powerful character.