Oooh, this was a dark game. I enjoyed the ambience and the overall setting of this game. I also really like the healing effect, it makes the levels much more bearable to go through. The audio and graphics go well together, and the combat system is pretty basic but also fairly challenging at some points.
I'm not really sure what dropping and picking up the light ball adds to the game though. For me, the game would play out the same if the light stuck with you permanently. I would add some switches that you have to drop the light ball on so the player has to risk himself in the shadows more often.
Overall, great entry and I really liked what you've made. That ending was super dark, lol.