Really interesting concept!
Visuals are amazing, and exploring the planets is fun. I kinda wish I could do more on the planets, like find different collectables or something, because I was kinda in a rush to refill my fuel and go to the sun (I lost a couple times because I was more into exploring than completing the objective haha, but that's on me).
The controls felt good to me, the landing felt a little bit weird but nothing too problematic. I like the music, and the mood of the game is great. It's a real nice touch that when you're near the sun the background changes.
Overall pretty good experience, and the game is pretty polished, and left me craving for a full game of 2D space exploration. Something like a No man's sky 2D mixed with a platformer of sorts. Great job here.