Skyscraper aims to be a fully-featured, modular, 3D realtime building simulator, powered by the Scalable Building Simulator (SBS) engine. The main feature SBS provides is a very elaborate and realistic elevator simulator, but also simulates general building features such as walls, floors, stairs, shaftwork and more.
My younger sons like this game because it gives them the chance to 'ride' the elevator of a very tall building without being there and feed their compulsion to press the elevator buttons. Thank you to the creators, you made some autistic children very happy.