Took me a while to get how the game worked as well but I enjoyed it! I feel like this game really fits the scaling theme in the sense that I felt powerful as the game went on, like you're scaling in power or something like that lol. I agree that working on this further is worthwhile -- leaning into that "super fast meteor zooming through space" power fantasy with more effects and maybe having the camera zoom in/out or use funky effects would help improve on the already great atmosphere this game has.
I really enjoyed the slingshot mechanic as well. The way you implemented the steering controls was pretty awesome, and I found myself replaying the game over and over and over so I could get a better grasp on the controls. I agree with what mjholdham said! Really great job on this game!