Constructing a ship out of the parts is a really interesting idea. And I also quite like the visuals.
It is a little hard to control though, I wish modules would stick to the ship more easily. I also wish the turrets would shoot automatically, I remembered about pressing space only by the end of the game.
I think the optimal strategy is to build a long thin ship and just sit somewhere where there are no shooting enemies and tank the asteroids. I don’t think you can have enough damage to destroy them with turrets. I managed to win with this strategy after losing all the modules half-way through.
Overall, this is a solid entry. Good job!