Hey Miles,
Great entry! Perfect fit for the theme and an interesting concept. The music was at a good volume, though I would have enjoyed some sound fx when pushing birds/snakes/alligators away. And maybe an egg crack sound when I lose? Graphics are a good fit for this style, though the trees kinda look like you changed the color of the clouds. If you were interested in continuing work on this game, I would recommend looking into having the enemies spawn in random intervals, rather than at set times.
Lastly, and most important, let me JUMP! I was slamming spacebar when the birds were overhead but I couldn't jump up to fend them off.
Great work overall,
-Thxrst