Bridges are vital for the entire human civilization. Without them, we would have never found out what lies on the other side of the river. This tricky math game challenges you to build a bridge of your own providing a safe way for the train to cross the tunnel. Use your mouse to pick up pieces of the road, drag and rotate them with arrow keys by holding the necessary element up in the air and drop them into place, one by one. Once you are done, set the train going by pressing the ‘play’ arrow.