Man, this stroked close to home.
The flash of thoughts, having a completely normal time and then suddenly my mind went downhill, and the switch between angry at myself and angry at everyone else.
The, "Why am I crying?" hit me like a ton of bricks.
Usually I'm against fast-paced stories or no environment text, but it fits perfectly with this type of thing. It's hard to focus on anything else but those intrusive thoughts, so you end up losing time and awareness around you. That was a great choice.
The ending too though... I think it's important to know what to look for, and understand it's not just one thing in depression. It's a constant attack, and most people feel like if they let it slip to the outside then everything will get worst. I think this game is a good insight to that.
The only thing I could suggest at this point, is there was a flash of text at the top in the beginning. I tried several times to read it, but only could catch a few words each time. I get why you did it, but I'm so curious what it says!
This was a wonderful submission, and It's given me things to think about.