Cool game. I like how the giant skinless beast's eyes follow you around the room. Is that the eponymous Jusha?
Anyhow, the Souls games have already conditioned me into slaying monsters on behalf of mysterious female handlers so the premise works for me. I think you can afford to put a few more words on screen at a time. Also, you don't want to move the text around so much.
The gameplay is pretty good already, but right from the start I noticed how the player character attacks towards the mouse cursor, but dashes in the direction that the player character is looking at. This should be consistent.
The animations look really good but I would like to see more feedback for when the player gets hurt.
At first I thought that the best way to play was to spam basic attacks but after a little practice I was able to mix special attacks into the mix as well. This is a great sign for an action game.
Nevertheless, I don't understand why restarting is a special power with a setup time nor why you've got to fight the lizard again if you die at the blacksmith. This could work if say, the lizard and the blacksmith were 2 phases of the same boss fight but they feel too thematically disconnected for that and you heal between fights anyway.
Maybe make it a risk vs reward thing. Beating all bosses without restarting could have a secret reward attached to it or grant the player a score multiplier or a completion mark that's reset if they use a checkpoint.
About the lizard fight, it probably needs some kind of intro animation because it starts attacking the instant the player spawns.
About the the blacksmith fight, I think his ai broke a little bit a couple of times. He starts walking back and forth near the lower left corner and ignores the player until you get close to him again. I like how he has a sword but chooses to defend himself with his trusty hammer for the most part.
Finally, a minor issue I encountered was that the level is partially visible when it finished loading but before the fade in transition animation plays. That's probably an easy fix.
Keep up the good work.