Suggestion: START WITH OBSTACLE VERY SMALL AND SLOWLY INCREASE ITS SIZE --- For the obstacle exercise, I would suggest in the first generation that the obstacle (or ball rolling on the floor) should be about the size of a joint object. After that, it would increase in size slightly in future generations until reaching its maximum size, which should probably be the size currently used. When to increase the size could be every generation, or every 10th generation, or when a large enough percentage of the population manages to avoid it completely. My suggestion would be to first try increasing it every 10th generation. That way, early success will come more easily and can be improved upon by those members of the population that inherit it.