Strong submission. A very well-rounded game that feels super polished.
Small areas for improvement: I think the magazine needs to be a bit more central so it’s easier to see what the next shot is, maybe centered at the top. Otherwise, it’s too much effort to briefly take your eyes off your hero to check the upcoming shots, and eventually you stop doing it because the penalty from 20 enemy bullets flying around is much bigger than missing out on one blood bullet.
I also found R for reload difficult, because I have to briefly give up a movement direction. That can quickly feel unfair when you actually need to run to the right, have your middle finger on D, but also need it to reload. Put reload on Space instead. Your thumb is already there anyway, and it feels physically more powerful when you reload.
Maybe you could even say: Shift rotates the chamber to the left, Space rotates it to the right, and reload is on right mouse button. That gives the player the option to go, “Okay, blood bullet — I’ll rotate one slot to the right.”
The issue I had most often with spinning was getting 2–3 blood bullets in a row, which meant I constantly had to keep looking back and forth, as mentioned. But if the spin effectively becomes more of a skip, it feels more rewarding. It would also let me save something like the very strong one-shot for the bigger enemies and line it up exactly when I need it.
Other than that, great execution. I had fun.