you should be able to customize a duck before it hatches. like maybe you could make them level 10 at flying or something before you unlock that stage. You know how the duck has a random hairstyle when it hatches and you have to pay for a haircut to get the look you want. Well, you should be able to choose that before the egg hatches.
 "Fancy Pants Adventure: World 3"){kind=icon}
 "William and Sly 2"){kind=icon}
 "Mutant Fighting Cup"){kind=icon}
 "DuckLife 4"){kind=icon}
 "Interactive Buddy 2 (Prototype)"){kind=icon}