Game looks super cool. Nice to have a tutorial to explain the mechanics. although it is not 100% clear at the first go how to use the abilities of the planets.
One small suggestion: can you update the game size of the browser build to fit better on screen (or make it open in a separate windows, full screen)? (there should be some settings in the itch.io edit page of your project) Now I cannot see the full game without scrolling back and forth :)