Phew, that was intense!
I love the art style and the implementation, feels very good to play. The sound effects and music are also quite fitting, and the idea is cute. Sacrificing chicken is exactly what these feathered devils deserve! :D
My only tiny complaint would be the difficulty, it got hard petty fast, and in the Main Menu some button feedback would be nice like highlighting the font when the mouse hovers over the button.
Overall a really well made and fun game! Great job!