Wow. A really awesome and polished game with a cool concept, couple of interesting mechanics, great visuals, nice sound and music. Some rebalancing and problem fixing (when the balls get behind a whole cluster of planets, there's not much you can do other than hope, maybe some way to blow up the balls would help), some additional stuff and monetization ways, and it would be a great mobile time-killer!
Please check out and rate my game, too, if you can find the time - https://daromaru.itch.io/solar-crew