For those that suffer from depression, I can see this game reflecting what they might be thinking and feeling in their darkest moments. There's a raw reality, sadly, in the unavoidable conclusion of this game. Some might appreciate this, but this is definitely a Marmite scenario because I'm not sure if you should play this game when you are depressed or at a very low point. Reaffirming what your most negative thoughts are about yourself, does not seem like a wise thing to do and this game does not offer much hope, just affirmation.
The game itself in terms of mechanics is more of an interactive story whereby you have little sway on the outcome. It's a basic style, done in RPGMaker and the creator has put effort in where he can with little touches and the dialogue. That said this game is dialogue heavy. The narration screen which projects the thoughts of the lead character is what you'll see more than the environment.
This is not a bad game, it's a basic one, it came from a powerful and real place, but I think that I would not recommend it, based on my own conflicts with being stuck in depressive ruts. That's not to say it's awful at all, but maybe it's not the gaming remedy someone needs in their sad moments