Bridge Constructor allows you to design as much as you like. What is the core of the game? You have to construct bridges under various conditions. You will need to cross a stormy stream or build a bridge over a deep canyon in the mountains.
It is not enough that the bridge has to be constructed. It must also be fully functional as a crossing. How do you verify it? You can check it through tests. To determine the suitability and viability of the structure, you will need to test it.