Air Traffic Controller

Since the creation of the first airplane by brothers Wright pass 115 years. Since then, the aircplanes have become the most widely used device for long distances and also the safest. But no one would be safe if there were not skilful navigators who, were guiding pilots to a landing without colliding with other planes. You are exactly the navigator like this and your task is always to help an airplane of the one colour to land off on the platform of the same colour. Be careful, the planes must not crush. Have fun.