This is such an interesting concept! It's like you're Elizabeth in Bioshock Infinite doing your best to keep booker alive.
I'd say some of the areas that might need more attention include the sprite design and some of the game mechanics. For instance, I'd love a mechanic that notifies me when my health is getting low. And it'd be great to have a way to regain health without just relying on a potion to show up?
Maybe even a boss battle could be fun!
All-in-all, great work!