I couldn't move with WASD and the UI health bars are 1/3rd of my screen. If we take those off, I think you got a good prototype. I love the VFX with the sword swing, I bet you had fun making that. The sounds are good and I can see the concept implemented, although it is very ordinary. Keep up the good work, I would take 2-3 hours after the jam to fix the bugs and still show it off in my portfolio :)
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BTW don't get discouraged because of the UI or the bugs. I had a lot of issues in my first 2-3 game jams and that's how you learn. Even after a few years I still missed the deadline and had to submit late XD, the important part of the jam is you improving your skills and adding stuff to your personal portfolio!