Ruber Eaglenest has made several games before with serious themes written in sensitive and poetic ways.
I found this game beautiful as I started it. The emphasis on colors and nature felt soothing, mixed with melancholy at being a ghost.
Interaction was confusing at times, perhaps to show what being a ghost would be like. You have three options most of the time, but they change as you select things, possibly in a pattern, possibly just based on how long you've waited. I never had too long to feel frustrated.
The ending was moving, and a reminder of (Spoiler - click to show)the horrors of war, and our responsibility to seek peace throughout the world. A very effective piece.