The feeling of isolation and the descriptions of infestation are super strong in this.
spoilers
The switch between voices/fonts is a subtle but powerful choice. I love the interruptions and changes of voice within paragraphs.I would’ve loved to know more about the mission and/or the PC’s background. For example, on my second play I picked “It doesn’t hurt at all,” which gave me text about how all the pain from before is over, which made me want to know more about what pain, and what people I’d hurt and how.
This of course reaches beyond the bounds of a Petite Mort, but if you are thinking of developing this further, that would be something to focus on.
Even something as simple as using the “window” screens to show block colors instead of reproduced space felt like something that I wanted to choose rather than have decided for me. And that choice leads to deeper connections in the text to the themes of “letting the outside in,” curiosity about the Other, etc.
And a formatting nitpick—this probably works best on a phone, because reading lines of text across my whole computer screen can be tiring, even for short paragraphs in a short story like this. Some kind of margins and text wrapping would be welcome.
All in all, this is full of chilling, beautiful descriptions.