Well...
It's not that hard, especially once you get the timing down for bosses and the harder enemies. If anything, it reminds me of those bullet hell shooters of old where timing and skill was everything.
The worst place has to be the swamp area filled with poison and decay, easiest being world 4 with the storm beasts and skeletons. I highly recommend a bow and arrow there.
Biting the hand that feeds IT
