I also made a Hotline Miami inspired game so I wanted to give this a proper chance but I cannot pass level 3. The enemies have 0 telegraphs for their attack and they attack VERY suddenly so if you don't kill them immediately you're toast. This did make me have to think about my movements and take cover in rooms which felt fun but making level 3 that long just made it frustrating.
I like the crafting bullets idea I just wish we could craft whatever we wanted without a crafting bench because I was basically just stuck crafting the regular shells and couldn't really plan around using different shells without just camping a workbench. I enjoyed the mechanics overall though, nice work y'all.