I agree with the other that you made great use of the polarity concept.
Your art concept is also fitting together great.
I would have liked to see better AI. But that is obviously hard to make in such a short time.
In addition I was missing the feeling of sling shooting with planets. More me it felt like that the major force was direct push and pull. And not really sling shooting around objects more like away from them. Hard to describe. Check out my submission to see what I mean.
Nevertheless I enjoyed it.
My final time on track 3 was 6:21. I am sure that could be improved :D
Edit* nice music you had