Incredibly iconic level, and very underrated. I dont know how the difficulty scale for this website works, but my use of "68" places the widely regarded easiest extreme demons (say Cataclysm or Acu) at 75, and Nine Circles at 50. I dont know if I overrate this levels difficulty as a "hard insane demon," but its so fun that that hardly matters. Masterpiece level in memory gameplay, design decoration, and vibes, probably my favorite insane demon all things considered. Super innovative. The only gripes I have with the gameplay that brought it down to a 9/10 (probably very strict on my part tbf) are the mini wave part where you dodge the yellow portals- this part isnt bad at all, it just feels way harder than any other parts of the level, and the first parts that signal the slowdown of the level towards the end, the ball in particular is just stupid. Other than that, perfect level