Very good ! Especially for a first jam ! The visuals are very well used and it definetly fit the theme.
I thought we had the exact same gameplay idea at first but, yours turned out quite different.
A few feedbacks:
It could have been a good idea to add a way to speed up the rotation. if you miss your fling, you're just sitting duck for a full rotation.
I didn't had to use the laser a lot. since there was quite a lot of small asteroids spawning. Instead of breaking the big ones I often just pushed them toward the enemies.
Appart from that, a pretty solid game. Good job :)