I love to see when people take the theme directly to the character controls! Really loved the cool vibe when moving the mouse around like a crazy man to increase the level of the sword.
I'll probably work a little bit to let the player know when a boss can block their attacks (I see you second boss), and probably forward more to enter into the combats.
Really nice submission, and the SFX slider destroyed my inner ear xD (probably a cooldown for the sound will be a fast fix)