This is extremely polished and I like the different take using Chinese mythology, which is very cool!
Unfortunately it seems to me that a large amount of this game is rehashed from previous games you've worked on, which to me feels a little against the spirit of a jam. 60% feels like an overstatement. The art is wonderful and colorful and the VFX are excellent, but most of it looks rehashed so I'm conflicted on my feelings.
The character is cute and the writing is fairly good, alucard is quite a charming cameo and I enjoyed the character's rapport. I can tell english is a second language for you and the english is fairly accurate, but at times still feels a little unnatural, so maybe running your script past a native speaker to tweak some wording would be wise in future.
The gameplay itself is pretty fun, I think the difficulty is a bit inconsistent and a simple solution would be a checkpoint on each level. The game as a whole feels very polished but unfortunately under-tested. I would highly recommend doing a blind playtest with a friend or two next time you jam.
Overall I have very mixed feelings because this is an excellent game but the asset and gameplay reuse really sours it for me. I think you clearly have the skills to make something excellent, and you can do it without relying on recycling. I hope next time you do a jam you go the extra mile and make something just as good from scratch.