Simple game, but actually very fun! The only thing I'd have liked to see is some kind of difficulty curve. Maybe the spaceship gets faster over time, maybe there are bigger planets in different star systems, maybe gravity starts affecting your trajectory more, or maybe there are random events like asteroid showers... idk, just throwing ideas. At first, there's a nice challenge in getting used to controlling the spaceship, but once you get past that, the game reaches a bit of a plateau. That's totally fine, but I think some kind of progression in the challenge could have made an even cooler and more engaging game. That said, you've made a neat little game that has a really cool core idea that I'd love to see developed further!