4th floor of Labyrinth is ATROCIOUS. First two floors were fine, hell even the third, while annoying with not being sure where the keys were - fine. Fourth floor, between the lag and the near constant trap floors that can't be avoided, I'm about to quit. I've been hooked and this one section has completely soured the experience for me.
Protip: make sure the clawed girl is right behind you so she cant surprise you.. then keeo going. There will only be 2 dead ends with keys so expect 2 battles. In the battle focus on draining her mana so she wont hurt you as bad. If you stop draining her mana by going to fuck her she'll hit you hard trust me