Oh, well done. It’s okay to stop somewhere. The game starts as a cakewalk, but I’m amazed at how hard it becomes.
The “fake” final boss is nowhere near as hard as the real final boss, which is nothing next to the optional Nightmare King Grimm.
The normal path through the White Palace is itself pretty easy compared to its optional super hard detour.
And then you can try the whole game on permadeath mode, if you want.
But that’s nothing compared to the super boss rush mode of 40 bosses, which lasts more than an hour with no break. And if that’s not enough, you can try beating the bosses on one hit death mode individually of redo the whole boss rush crippled in four different ways.
That rabbit hole is very deep.