Wow, I got immediately very sucked into the game loop here! Definitely could see myself idling this for a long time, especially if there were more complex upgrades and obstacles. Few quick ideas of how it could go further -- unstable / non-periodical orbits, chaining together satellites with power lines to destroy asteroids for upgrade points, etc. Love how much depth comes out of managing a very simple initial system; and the slingshotting of satellites especially makes it fun and a little chaotic. Nicely done!