This is probably the most creative interpretation of the theme I've seen so far! I felt like I was playing a small RTS with how much I had to manage the planets. I think the core mechanics are simple enough to quickly pick up, but trying to get a high score is difficult and requires practice. As other people have said, the visuals, music, and sfx also complement each other and the aesthetic of the game very well.
One point of feedback I have is that the asteroids are a little hard to see against the dark space background, but maybe that is intentional as it's realistic and part of the challenge. My high score was 635, but I don't have access to a mouse at the moment so I think I could do better if I wasn't on a trackpad. Overall, great game and submission!