Really nice job setting up the graphics and sounds as that can be difficult, I see that you got them from an asset pack and with that said I think you should use more of the time of the jam to focus on play testing your game and fixing bugs in the code. Like Brackeys always says it is super important to play test or have other people test your game!
Also there are some grammar mistakes in your intro story cutscene, another reason it's good to have others test your game for you :]
Overall you could really make something nice out of this game, it's mechanics (loved the soul ammo) and story are really thoughtful.