Ahah I can see myself as a gameplay dev in this project, the number of desired features is impressive and I suppose that in terms of adding content it's expected to be easily achievable :D
This makes for a very interesting game, but also one that's not very readable (the graphics don't help, but it takes a lot of time, so I understand). To solve this problem on my side, I start with very simple ideas, with a good code base, and then I make it evolve when my base is ready. Start small and then have fun with the mechanics! In terms of mechanics, it's very frustrating to have to spam click to throw the feathers, so maybe I've missed a shortcut, but if there isn't one, it might be nice to add one to throw more at once.
Anyway, the concept is cool and I hope there'll be an evolution! ^^