I got up to level 7. While the game functions well enough, I couldn't seem to figure out how to control what was going on. What do the three sounds do in particular? The clap seemed to send them in the opposite direction, the whistle seemed to make them all scatter randomly and the rattle didn't do anything at all. Do the cat colors mean they behave slightly differently?
It simply felt like I was just doing random things and hoping for the best. Which I guess emulates actual cat herding pretty well, so in that regard you nailed it. I wanted to enjoy it more, but after a few attempts at level 7, I threw in the towel. Also, while the visuals fit a low resolution look, the movement wasn't really 64x64 as things broke the grid as they were sliding around.