Absolutely beautiful game, the planets and environments are gorgeous and the ability to change the color palette is a lovely touch. The game gives me flashbacks to playing X Wing vs. Tie Fighter back in the day. Doing something this convincingly 3D while still feeling like a gameboy game is a major achievement.
I would suggest making it easier to stop the player from rotating / spinning in place, possibly more closely tying their rotation to their speed. Multiple times I would overshoot something, want to turn around, and get myself spinning wildly out of control which would take over a minute of headache-inducing spinning, even as my forward speed was zero. Especially when it feels like the vibe you're going for is chill exploration and storytelling, the controls should make it much easier to slow down and take a breath.