I don't know what problem people have with the difficulty. I don't even recall what level it is that was supposedly so hard... The only level that actually annoyed me was the one where you had to let yourself fall, because there was no reasonable way to avoid dying.
What i didn't like about the game was the story. It is bland, pointlessly mixes up mythologies and tries to sound like serious business while actually bathing in cheap cliches that even somebody who accepts the premise can't take seriously.
I'm still giving it 3 stars because the art was not that bad and the difficulty was, for the most part, well done.