Very fun roguelike "solar-system"builder! I really like the art and SFX. I do agree with the other comments that it is a bit hard initially to make sense of how you would compose lineups, but I feel like I had gotten a decent hang of it after a few attempts in the main mode, I do think adding more progression aspects (like having less planet slots at the start) would be a good way to weave in the main way of gameplay. Over all a very fun concept that I would definitely love to see expanded upon! Currently exploring the sandbox mode and I am enjoying it a decent bit too :)