This is a fantastic foundation, loved the art and visual design of the menus especially! Now just add some more gameplay mechanics, like idk, balloons that you have to dodge or asteroids that can manipulate your gravitorial trajectory, or maybe even "war zones" where if you land a package you instantly lose, and this could be a cool small paid indie game.
If you're gonna update this, please make an "Ico sphere" with blender instead of the UV sphere for the Earth, it looks much better, especially at low poly. And I'd like a bit further zoom out range for the later levels. Also, I recommend making the reviews not randomly selected upon level completion, but to have the list shuffled at runtime, so that you can't get 2 identical reviews in a row, that can really decrease the immersion.