Love the artstyle, but maybe I just didn't get the way you are supposed to play. I imagine you should dash and jump over the enemies to dodge but the camera is too zoomed in for me, personally, and I found it way easier to just stand still and shoot slowly back towards the horde of enemies.
The upgrades seemed to not change very much but I appreciate they are there at least to give a sense of progression.
Overall I liked the gameplay loop I ended up with but not sure it was intended.
Great game, good job!