This was cool! I think this might be one of the only Jam games I've seen this year to actually add in achievements, so good job there! I think it's a little bit of a stretch on the theme though (Easy fix: make the boat a spaceship that you've lost control of. Nothing else has to change).
It can be a little bit difficult to see some of the asteroids when you're below them, because of their black shadows blending in with the black background. I think a little bit of ambient light, or adding in a background of stars would completely fix the issue though.
Overall, great job! I had fun playing (Although I don't think I have the willpower to grind out 1 million points, I'll leave that for someone else lol).