The concept is super cool. I love how the spacetime grid warps as you make planets bigger and smaller, and it shows how the gravity affects you and other things. Genuinely a sick concept.
I do wish there was a tutorial however. I wish that the planets and stars could stay big as well, I felt like they would shrink immediately as soon as I made them grow. I also wish I could hold down my fire button instead of having to spam it too. I wish the camera was a bit more zoomed out so I could see more, the UI takes up too much of the screen. The controls felt very slick and jank as well unfortunately. With some polish, this could become a sick game.