Usa el ratón para pulsar sobre la nave y dibujar el trazado que quieres que siga hacia el muelle de su color.
English :
You're the brand new harbour master, your job is to guide the ships into the correct docks so they can unload their cargo safely. Be careful what routes you plan for the ships as the lanes can become really busy.
Use the mouse to click on a ship then drag a path to the coloured docks to unload.