This is probably the most engaging thing I seen in terms of the limitation! Cool theme, lovable characters, genre switching, world-building (something's happening to the yellow duck, I just know it), and there is a desire within me to play more. I was collecting all the berries up until the Bird Quest Flappy part. I was wondering if there was a secret ending based on how many berries you got, that could be cool. Anyway, I really loved everything about this, fantastic job!