Yes, that does seem like a good game to promote awareness and help people realize how depression really is like from a first person perspective.
I have a friend who currently has mild depression and it's already taking a toll. I can't even imagine what a full-blown depression would be.
There's actually a game about depression that I played before. It's quite good and maybe you could get some more ideas on how you could go along with your game. Here it is:
Depression Quest (
https://textadventures.co.uk/games/view/_ioz6gxhjuobkgbw6ujnxa/depression-quest