The art looks really good, and the game feel is overall nice, but the one-directional turning often leads to inescapable situations when lots of bullets are on the left.
True, I've noticed the same thing. I have some ideas on how to mitigate that that I imagine I'll implement in a post-jam version.
For one, I plan to make destroying a pirate restore a small portion of the player's health - I'll probably also reduce the rate at which "right-handed" ships spawn, too.