SimplePhysics - the player is given a job with a small description. Need to build a strong and durable framework for the use drawing board. You can zoom in and out the camera, with the fingers (as zoom photo). In the design process, you can see how the load is distributed on the system. Find the red zone (area at risk) and strengthen them. By the way, you can interact with a dummy, and manipulate the building, and another blow to the complete destruction of all. In SimplePhysics uses real physics. Download the file: