This is a really fun little sandbox to mess around in, and having the additional context of your post-mortum was really eye-opening for what the intended scope of the project. (Seeing this in VR would have been amazing, even if ultimately that was really ambitious to even consider doing within the jam's timespan.)
There's fun to be had - the wibbly-wobbliness of the NPCs walking round is really fun - ditto for smacking them around and watching them bop around like car salesmen blow-up displays. The various voice lines are fun to get, and hot damn, is that bite animation good. It gets that visceral nature of vampires in a way few games do!
It's a really interesting prototype with a lot of ways you could nudge it - it'd be cool to see what comes of it in the future if you ever returned to the idea!