I wish the parry timing was telegraphed in any way at all. I spent three different careers trying to figure out when to parry and for all three tries, I only parried a single time. The control shown in the tutorial was also incorrect so I'm not counting the first career I spent pressing Z and seeing nothing happen when the correct key was actually W.
I love the art style and the music was fine but the sound design was bad enough to be distracting, especially the two sounds that repeat in the wind-up to a punch. I can't say if the vampires have different move sets because since I couldn't manage to parry at all and just dodging with the arrow keys takes so, so long to drain a vampire's stamina, I didn't manage to win a single fight and advance. So I don't know if the other opponents are good or if the upgrades are interesting.
I also always got the same model for the vampire, despite the fact I'm almost certain there are several enemy models, so maybe I just got unlucky with the RNG. Overall, I think the concept was very creative and the art direction well-realised, but the gameplay itself was confused and a bit hostile and the sound design just made the experience rather unpleasant.
Regardless of my criticism, good job on completing the game jam; this is not an easy thing to do and you should be proud that you completed a game in such a short time frame.