Really felt conflicted on this! On one hand, the game looks and feels very stylish and cool: the intro was really neat as were the slick door transitions between screens, the graphics were low-fi but had good icons and general presentation, and in terms of gameplay, the guns felt very punchy, the enemies were varied with interesting attacks, there were neat power-ups like the extra drone and the planes felt so smoothly animated and controlled.
But on the other hand, I felt like the intro went by way too fast for me to read and could benefit from some voice overs to punch it up, the door transitions were oddly muted and would benefit from a satisfying bzzz-ka-chunk-vrr sound to give it some extra oomph, the graphics were incredibly bland and boring at times with repeating the same background over and over and enemies being so sparse to not allow for the usual fireworks, the power-ups were unsatisfying as most of them were just stat increases that are barely noticeable or only noticeable if you luck into getting a certain gun, and most of the enemies felt boring and badly paced to fight as there were not put into interesting waves or formations to fight. In general, it felt like while the game has a good and slick core look and feel to it, it just felt like the gameplay overall was very boring, slap-dash and had no sense of progression to it, making it all feel meaningless in the end.
Looking at the constraints of the jam now I can understand that maybe it was unfortunately hamstrung by size limitations, but I just want to give my opinion coming in as someone who isn't aware of that. I'd love to see this or another shooter by you all come out that is more fleshed out since this does show a lot of promise!