Physics skills are what you need to successfully play this construction based game. You will have limited funds that you must intelligently use to buy beams and cables to construct bridges. After you have successfully constructed the bridges, you must click on the switch to let the truck drive across the bridge. As the truck passes across the bridge, the beams will be highlighted with red, which means the stress limit is beyond the capacity. You will have to ensure that the bridge is strong enough to support the weight of the truck. The increasing levels keep increasing in difficulty. Use the mouse to play the game.