I think I got to level 7 or 8 and found it too difficult and couldn't find a strategy to beat it. I feel like the combination of both:
1) The sheer number of cats
2) The jumping power of each cat
makes the level feel a bit luck-based as it's impossible to predict the movement of each cat. Spending extra time on that level's design could both push the player in the right direction and give the player a greater sense of satisfaction for building a strategy that consistently works.. or maybe I just suck at the game :)
That being said, I still had lots of fun despite dying so many times, and a lot of that has to do with the satisfying feeling of jumping and moving around. The music and graphics were really cute and cohesive. I was also invested in the Grandma Gertrude narrative xD