Sadly it doesn't really relate to the theme as others have pointed out. But I'll ignore that for the rest of this comment.
Good
- Nice sound effects in the game
- Variety of different asteroids to hit
- Actually pretty fun once I got the hang of the controls
Could improve
- More music? Like in the menu and while playing
- The controls are a bit weird but maybe I just wasn't very good at using them. I ended up just going for coins because it felt too risky to try and shoot the asteroids
- I often died when hitting the blue asteroid because it split directly towards me, maybe make it split 90 degrees away from the direction that my bullet came from? rather than being random
Overall it is a fun game with some issues I've mentioned above. Good job :D