Super cool concept and execution. I think the sound design was on point here, and combined with the background torches and chains, I could tell that you really cared about creating a vibe. And you did just that.
I appreciate the raw action-platforming without major puzzle elements. You focused on one genre and did it well.
As a suggestion, I felt that the timing windows were too unforgiving. I think that if the player blinks into a wall, they should be nudged to an open space if they're within reasonably close distance.
Also, I liked the ending cutscene. Those often get cut in game jams, but that extra work made the end of the game more satisfying.