That was great! The audio and visuals are amazing. There were a few parts where the bounding boxes were a bit too big and the bird got caught in a cog without the visible part of the sprite actually touching. Also, pressing SHIFT five times in a row is the default shortcut for turning on sticky keys, so that kept interrupting the call. It was still a lot of fun, and even though I messed up on XI probably fifty times, I eventually got it. Oh, and thanks for having some many checkpoints and rest areas!
Thanks for staying 'till the end! Sorry for any bounding-box issues, I'll get them fixed. Pressing shift too often is a common problem for many games, but sticky keys can be turned off in system settings. Maybe I'll change the key for cuckoo in the next build.