This was awesome and so addicting to play. The concept of the last level where there's SPOILER: a ton of gold and a few hourglasses and no door to exit lent such a sense of urgency to pace one's self and collect it all before time ran out. I ended up getting Rank 3 collecting 70% of the gold.
My only critique is the grunting sounds when when both attacking and losing kinda break the immersion. It's jarring to have a realistically human-sounding sound in a stylized game. It's the audio equivalent of suddenly having a stock photo of a human face in there with all the pixel art. Be more discriminate about choosing sounds that align with whatever aesthetic you wish to convey.
Regardless that's a small gripe in comparison to the rest of this excellent project. Great work!