Beautiful game, really cute aesthetic and story.
Having interact on Enter is slightly awkward as the choice selection is done with mouse. Maybe make it so that all the interaction and attacking is done with the mouse or have the dialogue choices on keyboard as well.
Primary mechanic of HP as a resource to dash is interesting, but there is not much other interaction with the HP through any other mechanics (no ways to restore and drain is not significant enough to impact anything).
Could be expanded into a puzzle game with much greater HP drain, or an action game with a spin. Though probably need to put the HP loss mechanic on a more significant action than a dash since punishing players from using the dash in an action game might be pretty feelsbad.