Played and completed only the v1.0 version.
Got roughed up real bad at the spinning pillar phases (the second-to-last phase) - this phase felt abnormally hard compared to everything else. But I was doing well enough before that I pulled through it with a couple lives left.
Oh yeah, and I really thought the big blue orbs were hazards, not merely background lol. Took me one (my only one) gamer over to realize that.
Anyway, I enjoyed the game a lot! Alice goes through character development I haven't fathomed before, and it's a story that happens right after Touhou 5 too.
After all of Alice's pondering, and all this flapping trial and the survival done, when I touched the arrow keys, it was so damn magical and deep.
If I had to tell one moment that made the biggest impression on me, from the whole Bird Jam, it has to be this.