This is a really good game!
The spinning world is a nice idea, and while being something to look out but otherwise don't bother that much about first, adds to the challenge later, which is really nice in terms of progression.
I found the upgrading of your ship also pretty good and really helpful over time.
Two things I didn't like:
I find the CRT effect in the upgrade menu more distracting than fitting, sorry.
And I think the ships acceleration and deceleration is a little high, for me the controls would feel better if they would actually be a little less snappy.