One suggestion I have. Can you add a new area in which some parts of the area are blocked by what looks like ruins of a city and these ruins can only be cleaned up by drones.
Addition: You need to clean up all of the ruins to progress. I have some ideas about how to make this part a challenge, but other ideas are welcome. Needing power to supply beacons is an idea, but that will be confusing because beacons clean up windmills.
