YOYOYOO, What in the hidden GEM is this!!!
The camera shake, SFX and blood burst is really satisfying, you really hit on point with that+++. The core gameplay is really straight to the point and make player focus on the highest score, it's super fun and addicting! The tutorials are clear and gameplay went smooth. I think the visual looks can be better by adding shader or filter like glow, bloom, etc, and the vfx can be more detailed and complete like rn you need player hit notice so it's more engaging, also you can try implement your sfx, camwork, and vfx on that player hit xD.
You can also add more variety to the horde and their ability uniqueness so it brings more fun! also you can add variety of weapon/tools/skills for the player.
It's a simple, solid and engaging hidden gem. I love it!