I enjoyed the atmosphere of it, the music and artwork contributed very well to the overall aesthetic of the whole thing. The poses of the people with flowers growing out of them were nice, they looked as if they had resigned themselves to their fate and I liked those parts of it.
Beyond that, however, there was little to recommend it.
If it was a vertical flight game, it lacked the pacing, excitement and difficulty to keep you playing. It was slow, the obstacles were not that difficult to get past, and you could only move left and right, not up and down.
If you were going for a more story-driven, artsy game (which would explain slow pacing and a lack of any real difficulty) it also didn't make the grade. There was little to really explain what had happened or why your rocket was going where it was going.
Overall: I'm a bit confused as to the point of the game. It seems to be going for both a vertical-flight game with obstacle dodging, coupled with a story-based exploring game. Unfortunately, neither really worked well enough. It's very pretty, though.