I really like the vibe and the atmosphere of the game. Kudos for great timing with the monsters, I think they appear right on the beats, and the patterns are repeated for a couple of times allowing players to learn the pattern and know exactly where the monsters would come.
There are 2 things that I find can be improved. First, better visual feedback on how good my punches are. I understand that I should be aiming for the eyes, but Im not sure where the eye is - I know it is the white dot that by itself is not very easy to spot when monsters come at high speed, but how big its hit box is? I tried the normal run multiple times and Im pretty sure I got ahead of all the monsters yet still achieved not as good score as I expected (just around 5k), so I felt like there is no way I could improve my score without knowing how big the "perfect" zone is. Second, monsters coming from the top and bottom almost allow zero reaction time because of the narrow view horizontally. This would be quickly fixed by zooming out just a touch, or at least having an option to control the camera zoom would be really nice.
Overall, very fun game. The idea has been executed very well and the game has a good amount of polish. Great work!