Warning! Shortest review ahead!
Goal - eat all planet resources and build Dyson spheres
Pros - trains you in optimization techniques. Players doing OCD-layered buildings don't realize the power of spaghetti code
Cons - not fully automated and half of the time in-game camera tries to cut your nerves
Conclusion - The game is not bad, it's a casual production simulator at galactic scale. Give it a try (around 100-120 hours of gameplay to first finished sphere)