and I cleared whole the game. So, Isn't there no way to get lyrebird's feather?

so, im an achievement hunter and the only achievement im missing is the "collect all feathers" achievement. im still missing some feathers, though i have most of them. i cant tell you which ones im missing since idk what theyre called, but the ones i have are zonoark, pea, dabson, dede, poot, emperooster, baron, buridoss, cassowary, boss, kookaburas, francisca, blue-footed chef, magpie, bowerbird, lyrebird, and owl. if you have all the feathers, could you check the feather list to see what im missing and t...

just downloaded the demo and it seems there is no option to set up your input device so i am kinda forced to use a keyboard. i hope that thats just a thing for the demo and that the final game will have these options. otherwhise there might be a bit of a backlash for you guys......

I should've unlocked at least the first two achievements by now, having learned the third note, but the only way I can even see that achievements exist for this game is from the link on the store page, and of course none of mine are unlocked. Edit: As I continued playing I noticed that the other achievements were unlocking, so after I finished the game I started a new one and played long enough to unlock the first two. Quite annoying to need to do that though. I wonder if it had something to do with pla...

Will the wonderful soundtrack for this game be purchasable on Steam anytime in the future?