i like the game and idea.
I think ninja and zoomster are good and balanced but the others are to weak. the difficulty increases very quickly which is fine but with so many weak cats it doesn't feel balanced.
Thank you! We agree with you, not much time left for us to polish the balancing during the game-jam to some cats feel weak even though in some stages they are crucial. For example extra-exp and extra-life cats are super effective in later stages of the game but in current state they feel weak at the beginning.
We will be fixing and tweaking the game now that the jam is finished and thanks for the feedback