The graphics for the 2 sprites were really well done, but I wasn't a big fan of the background graphics. I sort of wish those would have been a little more hand drawn instead. The gameplay was fun, but a little difficult to understand the way the parry works at first. From reading the description, I expected more of a "block" mechanic than a parry mechanic.
In a future version, maybe the "successful parry" animation could have a bright flash? Or maybe if it stunned the black knight for 1-2 seconds?
But good job overall! Still fun to play!