Thanks for the review, it makes me feel good to know that I can make games. I first came up with the idea of earth as a creation of nature, but the limitation was: no green. Then I interpreted it as: ‘no green at traffic lights all over the world’. About the bug with cars, the car system was very hard to make. I was redesigning it and could have messed up more somewhere, but basically it's the best solution in 72 hours. Thanks again for the feedback.