This is your first game jam project? This is really impressive. You really made all of these assets come together in a very cohesive and convincing way. Gameplay is very smooth, and I found myself really enjoying the experience.
I did find myself losing track of where I've been, but I'm not sure if a minimap would help or hurt the project, since I did find myself having to pay close attention. I was also pleasantly surprised by the upgrade system (though I totally neglected the soul bar until I hit a sudden game over haha).
Well done!