Hello there. This game was a interesting one.
Spoilers
The concept of this game isnt to bad. There were things like the designs of the characters that were wierd. I get that there transperent because of the fact that there ghosts (I think) but because this game is only black and white sometime you just kinda blend in with the ground. The story had some holes that I saw. The character Sara we only see at the end. So we the player dont really know her. Also the UI had your stats like HP and ATK and seeing that this game doesnt use them it could be handy to remove that.
Final thoughts
The concept can work you just need to tweek with a view of the little stuff. Maybe a picture of Sara in the office so that we atleast know her. Maybe try doing something with how the inv works can help aswell.
Hope this helps. Keep it up