I was a Sega kid rather than NES, so I didn't play Duck Tales (apart from maybe for a short time at friends' houses; I can't really remember). But I did enjoy Quackshot on the Mega Drive/Genesis. That featured Donald rather than Scrooge and was a pretty cool Indiana Jones influenced platformer. The conversation above about difficulty was true in that game too. It wasn't particularly difficult, but challenging enough that you did have to learn the sequence a bit. In Quackshot's case, they got the difficulty about right, because without the difficulty, it could be completed in probably under an hour/hour and a half. It took a while to learn it, but it never felt ridiculously hard. Good balance.