The music is absolutely banger, very crisp and imediate feedback whenever something happen on the screen. The Arts are also pretty cool.
However, beware of some stuffs:
1/ Since you have no control over the character, the shooting feel responsive and sastisfying beyond just simple sound. Animations, Particles, Shaders.
The simplier a game mechanic is, the more polished it needs to be to gather attention.
2/ The bullets are unprecise and there are no visual indicator to that, I stuck spending 1 minutes pointing at a stationary zombie yet no bullet hit.
Overall, the game need a better polishing. 3/10