Thanks for the feedback! Even if it's criticism, it helps us to know what the users want more, and what they have problems with! Also, we're currently thinking of ideas to make the end of the boss stage more satisfying / more fluid (no pun intended).
As for the "scarcity" theme, it plays a part in the story along with how much time you have in each minigame. The ducks are scarce on money which is why they do the odd jobs (the minigames) :)