Really nice twist on the Asteroids gameplay! The visuals of the game are pretty solid too.
The only thing that I'm not so sure about is how the story was integrated in to the gameplay. There's nothing wrong with the story itself, and it actually adds a lot of context, which it great, but the setup made it seem like there was a specific end which never arrived. It started to feel like I was doing something wrong or the progression was broken. If you're planning on expanding on this, then it's a really good foundation that could easily be built on from this point, but otherwise it would make sense to make sure it's clear there's no specific end goal.