Whaaaow, this is the coolest looking thing. I really love the visual style and the sound design. It's so atmospheric!
I enjoyed the gameplay, though I do wish there was a bit more to it, once you get used to the timing dealing with the boxes becomes relatively samey. Perhaps one idea could behaving some time pressure (outside of the unholy hand when you have too many boxes) but then also more guidance to finding the enemies. So that you are forced to move less cautiously, but also don't get lost as easily. on the later levels i spent a lot of time just retreading my path trying to find the last boxes. I really like the dragging of the sword and how that affects the angle of the attack, would be interesting to play with that idea more somehow.
Also i'm curious, what did the pickups do? I couldn't really figure that out.
Anyways, overall amazing job, i think this is, at least to me, the coolest looking game on this jam :) The gameplay is also solid, just could use some more elaboration.