An FPS game in a game jam is a feat that I can only aspire to. Great job at cranking this out!
It was incredibly laggy for me, and I had a pretty hard time with the movement. It looked really cool, but I struggled to play it. I also had a hard time figuring out where the skeletons/damage was coming from, so I often died from unseen enemies because I couldn't find them and react in time.
Keep up the good work though! Congrats on the entry.