Darn thats difficult !!!..... but i loved the concept....its unique and fun. especially for a cat lover like me. Only think i would say is balance the difficulty level....it should not be straight, nor linear growing.....at one of the GDC talk video they said its should be fluctuating curve, and yep fluctuating difficulties do help a lot with retention rate....overall a great game
Also try out our game as well, hopefully you will like it