You made the controls really loose. I know that's how the original asteroids was, but in that game you didn't really need to go anywhere in particular. If you want the game to be more fun by requiring less precise movement, I would dampened all movement and rotation so if you stop turning or pulling space, your ship will come to a stop on it's own.
I know it's part of the challenge having the ship conserve momentum, but it's just not very fun that way.
Sorry most of this is just my opinion on game design. The game does look quite nice, looking somewhat like the next generation of the original graphics. And I like the mechanic where you have to pick up the core functions of your ship. It could be an interesting dilemma if I knew what all of them were going into each level and had to choose which was most important to get first.
Anyway, interesting game. Thanks for entering the jam!