Very creative game, pretty unnerving at times.
I don't think the story is too vague; it's pretty clear what kind of story it wants to be and gives enough information for the player to piece things together.
I had a fun time, and this got me intrigued. Good luck with the full game! This experience was focused and polished, so if you keep going this way, you can make something great!
I can see a lot of work and care was put into this game, don't let depression and trauma win, you are worth more than you think!