Loved the overall aesthetic of this! I have a handful of nitpicks with it; mainly stuff like the buzz-saw basically being pointless (or at least really quirky regarding hitboxes; I'm not sure), there not being a lot of feedback from damage across the board, and... maybe the fact that the final boss can just be shot at the second you can see it, meaning you can kill it without it really having any chance to fight back.
Overall, there's so much I liked here, though. The visual look of everything is, to be really blunt, sick as hell - I loved it. The color palette is a *bit* static, but given the time frame and everything, stellar style without a doubt.
One last thing though; the flash from the guns is a nice touch, but it definitely is a bit harsh on the eyes; While I was streaming it, I had someone mention that an epilepsy warning *might* be a good idea? Totally up to you, but worth considering.
Either way, good job! Amazing work!