First go, I couldn't even get through the first fight, I tried half a dozen times. At first I couldn't even figure out how to fight - even after I'd figured out I was the vampire!. I appreciate you went to the trouble of providing a key binding menu but I had no way of knowing that when I was dropped into a fight, and only found out when I pressed escape to try to quit the game. And after seeing the key bindings I kept trying to drain blood to gain health but nothing happened. I saw from some of the comments that there was a difficulty slider so I had a look and I put the player damage all the way up... and one shotted the guy in the first fight! Maybe could use a second pass on the game balance.
I liked the story concept, that was a cute twist. I did find the font quite hard to read though.
The graphics were very cute, obviously very polished but for me I'd have preferred a little more work on the new player experience (especially for a game jam, where people might only play once before moving on to one of the other 900+ games!). Being able to rebind keys is nice but I'd have been just as happy knowing what the keys were (even if it was just in the description on the page) and how to use the special abilities.
Mouse support would be nice, just for the menus - or at least put the back button higher up on the keybind page because opening it up just to find out what the keybinds were then having to go all the way down and right to get out of it was a bit of a chore.