The boss fight was the highlight of the game. It required some moving around to clear.
However, the regular shrimps were not really a challenge and there was no incentive for shooting them down. In fact, it was better not to take down some of them as they exploded into projectiles!
I think a scoring system would have helped as incentive to shoot everything down, with colored shrimps giving more points.
Additionally, the player hitbox is not obvious. After some experiments I figured out it was only Gura's head. I suggest including this information somewhere in the tutorial.
If you update the game after the jam, I think animating Gura's tail would give her more personality. :)