Really good submission. I managed to beat the boss, but I didn't use any turrets as they kept killing me... Feels good to have one, but sad I didn't use one of the main features. Maybe there is a way to balance things so that there is a bigger incentive to use the turrets for cheesers like me. Also, maybe some more feedback after hitting the boss would make the bullet hits feel more impactful, such as a flash animation, or a small screen shake. Great concept overall, and would have loved to keep playing against more bosses. Nice job with the art too!!