Jump from rooftop to rooftop on the skyscrapers of a big city. The longer you run, the faster you go and the farther you can jump, until you can even jump over buildings. Only running into things slows you down for a short time. Have fun! Jump from rooftop to rooftop on the skyscrapers of a big city. The longer you run, the faster you go and the farther you can jump, until you can even jump over buildings. Only running into things slows you down for a short time. Have fun!