Woah, what an EXPERIENCE! I loved the zen-like feel of this game, from the music to the simple controls, and the colorful BOIDS. It's honestly so amazing how artistic you make your games with such simple shapes and designs. I also really love how the stars look as well!
I think for critiques, I'll just say that the controls were a bit confusing in the beginning. When I dragged the hydrogen clusters to the middle, the hydrogen clusters would start spinning counter-clockwise around the star, and I initially thought I messed it up because I thought the clusters were supposed to go directly into the middle. It took me a couple more stars to realize that spinning counter-clockwise was indeed the thing that I needed them to do. Maybe making them just go directly into the middle would make things more clear? Or, even if they do spin around the star, just have them very visibly show that they are gradually going into the middle.
Other than that, though, I have nothing else to say! Really amazing job!