To play this game, first, set up the rearrangeable city blocks as you like. Then, place the self - driving marble cars on the blocks. Your main task is to design the traffic patterns. Think carefully and plan the routes so that all cars can get home before the virtual rush hour starts. When moving the blocks, be gentle to avoid knocking over the cars. After you're done playing, store the game in a dry place to keep the parts in good condition.