Works great. Controls could be a bit more snappy, maybe add (more) acceleration when keeping up/down arrow pressed? Visuals: even though I read the f***ing manual, I was still wondering what I was collecting. Collecting water & carbon asteroids also feels like a bad thing: explosion sound & visual. But I understand that's what happens when an asteroid strikes a planet :)
Also, I want more lifes, or a hitpoint system. Maybe more comment later when I progress :p