Thanks for answering!
I think that the reason why the difficulty felt so inconsistent in the comments you got is because it is quite difficult until you realize how to deal with the enemies, then they end up being pretty easy. That change is subjective to the player and can feel pretty good as a standalone level, a "one time puzzle" if you want. But it isn's as interesting to think of it as the main difficulty on a longer game. On the other hand, those that don't get the "hang of it" won't be able to get to the "easy moment".
Hope that helps you ^_^!!