This was so lovely and lonely. Doing the same thing over and over, in contact with no one, totally alone... I loved the text in the greenhouse and its timing. I wrote a short story years ago with a similar delivery (short, factual phrases to give the impression of mindless, solitary routine) with a similar theme, so that was quite pleasing to me personally.
I really liked how the cosmonaut was the only bit of color besides the friends and coffee, and how the person they were writing to was never really singled out (that it could have been any one of those friends in the cafe or by the tram). I think it adds to the lonely feeling and the fading memories in a natural and satisfying way. I loved that the player had to control the tram, to make it pull up and then leave after. I'm not sure how to phrase it, but in my brain it fits very nicely in the tragic tone.
The visuals are so beautiful! I love 1bit art, and the additional accent color was so perfect. Everything about this little game is fantastic.