It's totally okay to make a simple game with few actions to take, but then it would have to rely on those actions feeling really good to do its magic. While I understand how making pixel arts are time consuming, there are some polishes that take a matter of minutes to make. Simply making the cat bounce/jerk a little when its mood changes adds a lot more vividness to the interactive experience, and it literally takes 2 lines of code to do that with the animator. This would be a really time efficient method of polishing this game.