This could also be caused if he is clicking faster than the duck is de-spawning resulting in the game counting it multiple times, we'll look into it for the next one. Thanks for the feed back!
Thanks for the feedback! I'm actually thrilled to get my first comment haha :D Yeah the generation counter is the closest thing you could find to a score system in our game. Though it's also a factor into the speed of everything making the game go faster after each consecutive playthrough!