I had a lot of fun with this! Combat felt challenging but fair, reminded me of getting wrecked by 'The Pursuer' in Dark Souls 2. A good range of enemy attacks too which kept it interesting and the animations were spot-on.
I ran into a glitch where the Black Knight was stuck in the red unblockable attack start-up pose (see below) but didn't respond to my attacks no matter how much I wailed on him. Otherwise, a neat little game with cool parallax background scrolling too!