The scenario is that there are scratch cats and a dinosaur, and the dinosaur doesn't like to eat scratch cats that look similar to his color, so he preferres to eat scratch cats of different color. the scratch cats that live will reproduce and make more scratch cats that look more like the color the dinosaur doesn't like to eat mutability determines how much the cats mutate when they reproduce, if it's 0 then the cats don't ever change and they just clone the number next to the dinosaur shows the average distance between all the cats' color and the dinosaur color. if the number is low then it means all the cats look a lot like the dinosaur
update if you hover over a cat then you can see its information panel