Ooh...I didn't expect that. An unusual idea for a "game", but I could definitely see this as a final scene for a narrative space adventure or VN. Maybe a game adaption of David Bowie's Space Oddity, I immediately had to think of that song.

As far as I can tell, you did a great job implementing your vision. Maybe a slow fadeout towards the end to simulate the situation of the protagonist would be a fitting addition. Or removing some of the letters from the typed words at the end to show that speaking is getting harder. But those are just a few suggestions, overall I'm quite impressed!