I love everything about your game ! The idea of making a game using space physics could easily leads to something obscure, but you made it all simple and playful. Every detail works well and made the experience really enjoyable. It is a small and common thing, but I really liked the text that happens when a planet explodes. The step by step progression is also really comfortable. I will certainly come back to finish the other levels, there is so much of them !
Thank you for the work you did.