Systems and methods for multi-platform motion interactivity, is provided. The system includes a motion-sensing subsystem, a display subsystem including a display, a logic subsystem, and a data-holding subsystem containing instructions executable by the logic subsystem. The system configured to display a displayed scene on the display; receive a dynamically-changing motion input from the motion-sensing subsystem that is generated in response to movement of a tracked object; generate, in real time, a dynamically-changing 3D spatial model of the tracked object based on the motion input; control, based on the movement of the tracked object and using the 3D spatial model, motion within the displayed scene. The system further configured to receive, from a secondary computing system, a secondary input; and control the displayed scene in response to the secondary input to visually represent interaction between the motion input and the secondary input.