The night before I played this, my church had a speaker who was, at the time, Bishop (a pastor) to a number of kids who lived through the Columbine shooting. He recounted two of the survivors' stories. Those stories were on my mind while I played this.
The game calls itself "An Interactive Anecdote"--and I feel that's an accurate assessment. The way it's told, the details it leaves out, and its emotional inconclusiveness (in parts) gives this work a feeling of exploring a memory. Some moments are crystallized; they always happen the same way. Other moments are nebulous and change each time you revisit.
I can't say that I know what this piece is saying. I'm not even sure I liked it, or "got" it. But it was interesting, and maybe you'll get more out of it than I did.