The game was definitely challenging, but that is not a bad thing. Hard games can be great, and there are entire genres dedicated to being extremely difficult. The problem is when a game feels unfair. This game was fun, but I found myself dying so quickly for reasons that seemed unfair, which made it hard to fully appreciate. Dodging bullets felt great, but sometimes it just was not possible. I would suggest adding a viable way to heal, like regaining health when an enemy dies. That could make the game even more frantic and chaotic in a good way.
I really liked the gun jamming mechanic. It was a clever way to discourage constant shooting, but unfortunately, it did not completely work since holding down the fire button still seemed like the best option. Maybe make it so the player cannot move while the gun is jammed to encourage more strategic play.
I also liked the unique visual style, but the sounds felt a bit repetitive. A small trick that can make them feel much more natural is slightly altering the pitch every time a sound plays. That would make the audio much better. As a small addition to this feedback, adding a little screen shake when the player dies could make the impact feel much stronger.
Overall, great job!