The cat and dog will try to go to the green box. It may look dumb at first, but if it repeatedly hits a wall, it gets "sad". If it realizes it didn't get anywhere, it switches its movement. Another cat is created every 100 gens. Difficulty makes more black walls however it doesn't make the cats any smarter XD. Some cats might go through "depression" in which it just stays in on the edge and does nothing. Dogs, on the other hand, take more of a standard approach to the box in which it goes in a random direction and sees which directions get him hit with fewer walls and gets him closer. Also, a red ball called the doxy (dog [x, y])follows the dog's average position to make sure it doesn't get stuck. If the dog does, then the next dogen (dog gen) will start. Who will win... Find out!
I saw the snake project check it out