slider only sections (00:03:334 - 00:08:609 and 00:42:894 - 00:47:674) are feeling really underemphasized.
while music here is utilizing loud guitar and being brighter than in slowparts,
there's just a slight sv change that is barely can be felt while playing. no cool rhythms, no bright patterns, just plain 1/1 sliders.
to make these sections brighter and cooler to play, i'd suggest you to use more advanced rhythms, such as 1/2's or 3/4's. hard diff is using reverses + 1/2 patterns so imo using 3/4's would be nice to utilize for proper rhythm progression.
(00:48:169 - 00:57:070)
feel here no spacing contrast whatsoever.
jumps on really loud drums and bright vocals are having same spacing as slow part 00:50:806 (1,2,3,4,5,1,2,3) - here.
only thing i pointed changing in spacing terms is 00:52:784 (4,5), however i would recommend you to nerf this pattern for better contrast with next jumps.
try to differentiate loud parts of the song (00:48:169 (1,2,3,4,5) - ) from less loud by using different spacing.
(buff stars for louder sounds)
also, start patterns are feeling overused and i would recommend you to use not just stars, but also some other patterns.
"Abe_Mao_-_Kassai_Cut_Ver._-Askel-_Kumochas_Insane.osu" should be named "Abe Mao - Kassai (Cut Ver.) (-Askel-) [Kumocha's Insane].osu" to receive updates.
theres two kumocha insane .osu in folder, remove one of them
I think you could improve the playfield distribution on all sections because you always return to the center in some patterns and it feels monotonous to play.
I think you can improve the spacing/emphasis management. There are some parts where the emphasis doesn't represent the song intensity so it would be better to add more spacing variation to differentiate soft notes/parts vs louder ones.
For example in this section at 00:48:169 you have strong sounds but low spacing, making it feel very underwhelming 00:48:169 (1,2,3,4,5) - 00:49:487 (1,2,3,4,5) - etc etc.
00:58:718 (1,2,3,4,1,2) - 01:02:015 (3,4,5,1,2,3) - 01:09:268 (1,2,3,4,1,2) - 01:15:202 (3,4,1) - etc etc. The emphasis in the grouping/measure changes is quite weak making it monotonous to play, it would help adding some spacing variations between them to emphasize it better.
01:17:180 (1,2,3,4,5,1,2,3,4) - in this snare-kick part the song is popping off and spacing should be bigger to represent that, also 01:19:817 (1,2,3,4,1,2,3,4) - could build-up spacing and be a lot more impactful.