The app is structured in three main parts. In the first one the system decides a destination and an objective for the mission. The second is the core of the experience, with the user assembling spacecraft's systems and subsystems to build a technically consistent vessel and connecting the different part in a circuit to distrubute power and data through it. The app checks if all the choices from the user are consistent with aerospace design and engineering characteristics. In the third part we have a data-intensive showcase that let user explore information, news and technical data about the parts assembled.