Outside

I love the drawings; the characters are cute. The chibi character seems to have a small visual issue: a black rectangle floats over her head when she isn't walking down, and sometimes even in her portrait.

The tablet dialogue has a small mistake; it should say, "no one here will replace it for you."
Maybe when you get cut, your HP should lower?
Mian seems to have a sword and a shield; maybe patients shouldn't have that?

The story leaves too much to speculation. I don't know who the stranger is supposed to be— is he like a demon or something? Why was the protagonist in that facility? Is this some kind of creature containment situation? You have a strong foundation to create a great story, but in my opinion, something is missing that should tie everything together. It doesn't have to answer all the questions, but it should give the player a sense of fulfillment. Right now, I felt there was an objective, I completed it, and that was it. I think there was a plot twist, but I didn't fully understand it.

Good job regardless! I enjoyed it very much.