I've had this game a few months now, and only played it for like 5 minutes when I got it to make sure it worked, so this the first time I've actually sat down and played Duck Tales.  Did the African Mines first, then Transylvania, then the Amazon, then the Himalayas, and made it most of the way through the Moon Base level, so that doesn't seem like a bad first attempt, though this game doesn't seem that hard to me, even on Difficult.  If I had made it through the Moon Base level, I probably would've had at least 9,000,000.

It's pretty hard to gain $10,000,000. I swear I went through every secret room and rooms, and etc. and I still couldn't reach that goal.