What a terrific interpretation of the theme! The concept is extremely fun and I would love to see it polished into a more complete game: managing the routes of sever spaceships is very cool and entertaining. The art is also the right blend between minimalism and realism, it reminds me of the “kurzgesagt” style of animation.
My only suggestion would be to add a way to speed up time, as right now the player sometimes has to just wait for spaceships to make it to their destination. Also I feel that the energy bar depletes a little too quickly, but this is just a nitpick. Other than that the game is very cool, congratulations! :)