A nice little game! The idea is pretty good. If you added some sort of unidirectional shield to reflect the projectiles you’d have a really nice Asteroids / Arkanoid combo game.
I’ve managed to stay alive for a long time by only firing a single bullet. After a while it became a bit boring trying to evade the rocks and one bullet, so I fired a whole bunch more times. Within a few seconds the game became a bullet hell of my own making. It was pretty nice, trying to use the asteroids as cover (for the few seconds they were still around). Turned out it is much easier than it looks, as the bullet swarm destroyed most of the rocks pretty quickly and I could finish the game by getting rid of any stragglers.
It may lack polish, but it is a good jam game. I liked it. ;)