Always love fun bossfight games, really well done on this one! Definitely felt some hyperlight drifter vibes from this.
Some small feedback I had - would have been nice to be able to attack in the direction of the mouse - would be nice to allow for attacks while rolling, or if not, have some form of input buffering, where if you input an attack during the roll, then the character will attack as soon as the roll is complete - was a bit difficult to tell where the hitboxes where, especially with the boss's main body - ended up playing pretty safely in order to kill it
But overall great job! All the art and the sounds were especially well done!!