This is a brilliant game, it has a peaceful yet challenging feel which is hard to pull off, a simple yet soothing art style and it scratches the itch of the collector within me, at least it did until i got to the bird boss.
I have never wanted to throw my computer at a wall as much as i have when i faced his boss. At first, it was enjoyable and a clever idea, but when stage two came, it just slowly built up my anger. The jumps need to be perfect, as you have to line up on the birds to even reach, but you can't forget to let go of the buttons once you land otherwise you waltz on off the birds and have to restart. And once you get to the top, there's a non zero chance you can't even move to stage three, because you keep the momentum of the birds and crash right into the wall, which keeps you from scanning the boss. As for stage three, i actually don't have any idea how to beat it, maybe there's some technique i'm missing but i have no clue. I just gave up after a while since i don't think i'd be able to calm down and enjoy what came after the boss even when i beat it.
It's a fucking marvelous game apart from this boss, and i might just be godawful at games for not getting past it, i don't know. It's a shame i couldn't enjoy the game to it's fullest. Still, what you've made is great.