Great game! Perfect execution of the theme, amazing art and nice audio!
Something I realized, is that if you get the weapon upgrade, something like 260% bullet increase (sorry, I don't remember the name), the indicator of the player and the actual shots don't align.
Also I know this is a game jam, and there was most likely no time for this, but just to mention it: a minimap would be amazing here :)
I had a lot of fun playing your game! Just to mention, I love the generous hitboxes and the camera shake. It makes the game feel so much more alive!
Keep it up!