I really like how you incorporated this story into the game. It was one of my favorites at school:] The idea is very cool and the gameplay is pretty much seamless. I like the cut scene at the beginning too. It is really funny and makes me want to play the game. Overall really cool game:] 10/10 would play again.

From a thematic standpoint, I understand that the effectiveness of the wing flap is reduced when you have less feathers, but this creates a kind of composed punishment: the worst you are doing, the harder it gets.

This type of design can work (I played enough games of The Great Dalmuti to vouch for that!), but in this specific case I don't feel it does, because the difficulty is increased by reducing player control.

Maybe a compromise could be found by having the minimal height value of a flap not be zero but maybe half or a third of the max value?