Fun puzzle game, I love deduction puzzles. I think the feather was supposed to be single use, but I was able to use it unlimited times so someone who wanted to could cheese the puzzles.
Thank you for reporting this! That's an annoying bug, it is meant to be single-use indeed. Unfortunately I am currently doing GMTK and have no time to fix this before the deadline :(
Sorry for the inconvenience and thank you for playing :D
