Very nice prototype! I quite liked the writing for the main character and could immediately relate to her, haha. (Plus the little capsule bunny was oddly adorable.) I think the map layout was actually pretty solid for a short 3D Metroidvania demo, the central locked door made for a nice landmark to give a better sense of purpose to exploration. Plus, the last hidden health pickup was a cool touch. Best of luck with your future projects, 3D Metroidvania may be hard but I think your demo already shows plenty of potential!