I actually saw no reason to spin my ship, the enemies come down so slow that it's faster to just shoot straight at them. Eventually I tried this spinning just to see how it works, and ended up getting shot at a few times. Not a great benefit.
The art style is cool, some audio effects would have come a long way to improve the game, and also the waves take reeeeally too long to come after the second. But keep it up and rethink this mechanic, it can be fun if well implemented!
I would really appreciate if you could also play and rate my game, I'm looking for feedbacks! Thanks!