The controls felt unresponsive at times and the walking animation looked weird. I couldn't even kill the knight. It was a good concept though.
I found out you can hide in and behind things by pressing the space bar. Perhaps the idea was to simply avoid the knights.
I mean I could stun lock him with spamming attacks, I just couldn't find anymore content beyond him. But maybe it's unlocked by hiding. I'll give it another try.