Very cool atmosphere and vibe for the game. The art style, audio, and UI are all very consistent. The UI explains the basic controls well.
I like the counter system. It's reminiscent of those action games like the earlier Assassin's Creed and sleeping dogs. The counter animation is very smooth and satisfying to pull off. But a little visual indicator even if no enemy was attacking you would be nice. For now if you just press counter on your own, nothing really happens. Also the fact that the counter is so powerful I don't really need to attack at all. Speaking of attack, it is a bit hard to aim on keyboard and mouse.
Finally, the foregrounds and environment looks good but with a fixed camera angle you will want to avoid blocking the vision of your player this much. It's not always easy to leave the area too when you are surrounded. (see screenshot below)
Other than that, very replayable and well polished action game. Great job!