This isn't very good.
I realize you did this in under 2 hours, and for a charity game jam, but it's extremely obvious you did this in under 2 hours.
And I wouldn't take off points for that alone, but this thing starts lagging up like all hell, and fairly soon into the game. And that's because you use a *huge* screen and you just literally spam the ducks. It shouldn't take 2 seconds to know that's a recipe for disaster, let alone 2 hours.
Rule #1 in any good game design: Don't spam!