It was quite an experience. The sadness was felt deeply, and I think you've done the atmosphere super well. The story is also nicely-written, with those day-to-day moments intertwining in between bringing out that sombre nicely. Well done! The game looks really good with the shader, and fits well with the narrative. Overall, it's a nicely done piece of art.
Other things I like:
- Nice colour palette
- The environment looks clean and does not distract the player from the story
Suggestions:
- The camera is very zoomed in, and it feels really strange when walking. Could need some FOV changes/settings
- The text is a bit slow at times. It would be better if you could press a button to fast-forward the text instead of waiting
- It would be nice to have a background for the text as well, as sometimes it's hard to read white on light text