OK, for most games when it comes to whether a game is easy or hard the acknowledgement of it being easy or hard is pretty universal, but for Donkey Kong 3 all bets are off. For instance if you were to talk to Dean Saglio, Corey Chambers, and Mike Kasper they would tell you the game is hard for them, but if you were to talk to myself, Steve Wagner, and maybe Mitchell Elliot, they would say the game is easy.
I would say the game is sort of like those stereograms. The pictures that have 3D images if you look at it the right way. Either you are a person who can see the 3D image or you are one that can't. So is the game hard? Well I would answer with "It depends on who you ask."