Amazing game!
I wasn't sure if there was an ending to the game, or if the message was that the Sun is so far that it's essentially impossible to fly there :) But the engaging gameplay kept me playing and I found out.
Very nice roguelike gameplay loop, quite unique game and brilliant idea that fits well with theme.
Some SFX would improve UX a lot. Even just 2 sounds for collecting fuel and money would help a lot.
I like how it's not mentioned (I think it's not?) directly that it's best to fly as high as possible and start collecting money when falling down - I felt kind of smart when I figured it out myself :D
Great job, very impressive!