Really cool game, the visuals are really polished and the visual and sound feedback is clearly taken into account, which is a nice touch. I just wanna say that I love the boss introduction, the camera zoom is subtle but says a lot for intimidation, truly a "OH SHIT" moment xD
If I have to judge on one thing, is the camera shake. I don't know if it's because there's almost no smoothing or something, but it feels a little bit dizzy to shoot. I have to take some breaks sometimes because it was getting tense. If anything, add an option to disable it. Besides that, good job!