Nice! I like the voiceover, and the physics of floating in space, thethered together. It almost feels like a resource management game. Have you thought about making it multiplayer? You could fix the thrust to one direction from the astronaut, and allow players to rotate their astronaut to angle the thrust. Then one player could play with WASD and the other with the arrow keys.
The only thing that bothered me a little was that you fail when you run out of fuel - I was almost done, floating straight towards another fuel pickup when I was booted back to the main menu screen.
Very fun and chill little game overall, great work!