Simple idea and well executed, good job! I would suggest making the fire button be something you can hold down. Since the asteroids take so many hits, you end up clicking repeatedly and I could see my finger getting sore from it. Would be a good accessibility improvement. A level progress indicator would be good, too. I'm not sure what was new about level 2 vs level 1 either.
Don't get me wrong, this is a great entry. The graphics are nice, the movement feels really good (after comments are saying you doubled it?), and the audio is great. I always appreciate volume controls in a jam game and you excelled in that. Overall, great entry! Good job!