Id really suggest to make it so the more populated cities are more likely to get and the less populated cities are less likely to get, and also if you already did a city you won't get that city anymore until you restart the game, and you should add a red dot under the plane so you know exactly where your going to drop the package. There should be a free cam feature so you can just look at the planet.
Unsurprisingly it runs at 60 fps with my RTX 2060 i7-9700 CPU and 16gb of ram.