[General]
you should add about 1500ms of audio-leadin to avoid the map starting too abruptly
Overall volume of hitsounds is too quiet. Since your hitnormals blend really well with the music, you should raise the overall volume to make sure proper feedback is present. I'd suggest no lower than 50% even in the most quiet sections.
According to the album rip of the mp3, the correct artist is
アセイラム・ヴァース・アリューシア(CV.雨宮天) which romanizes to
Aseiramu・verse・Aryushia(CV.Amamiya Sora). Do confirm with a Japanese BN/QAT since i am not sure if using artificial characters as artist is still appropriate.
The correct timing signature for the song is 6/4; make sure to redo your green timing sections as there is a known bug of not properly inheriting changed timing signatures. Once the timing signature is revised to 6/4, please fix your NC patterns accordingly since grouping them in 4/4 is incorrect.
[Easy]
its a little anti-flow to have a faster sv than the note spacing, i'd suggest you keep a consistent 1.0x distance spacing across the whole diff for a better effect (it also makes a better transition to Normal in terms of difficulty curve)
00:22:301 - should have something here at the downbeat, preferably a slider that extends to 00:23:454 (1) and then remove the circle there
01:16:531 (5) - clap on start
01:26:916 - it feels really awkward to end the map before the music ends, a good alternative is to place a spinner here and end it at where the other diffs end.
[Normal]
00:09:224 (7) - the curve on this is a little too much, smoothen it a bit
00:32:301 (4,1) - small spacing inconsistency
00:59:224 (5) - should have some sort of clap on this
01:16:531 (2) - clap on start
01:25:378 (2) - NC here instead of 01:24:993 (1)
[Hard]
00:32:685 (1) - i would break this into a circle and a 1/2 slider for the drum at 00:32:878
00:50:570 (3) - same thing here, you shouldn't skip 00:50:762 especially since you covered all the other claps in the kiai
01:17:878 (4) - since this starts on an offbeat, use a triplet first and then start the repeat slider on the 3rd beat at 01:18:070
not sure why the end is fully whistled, sounds a little too much imo
[tm's Insane]
00:22:301 (1) - clap should be on the end instead of start
00:41:916 (1) - for the kiai claps, i recommend you fall back to the custom soft samples since it sounds more fitting than the default drum ones
01:09:224 (6,7) - this could be moved a bit furthur for a better transition effect
01:16:339 (4) - this should be 1/4 (the middle one sounds slightly early but its not a problem if its covered with a repeat slider)
don't forget to fix NC usage after timing is changed to 6/4
[Insane]
00:22:685 (5,6) - this is very awkward to hit, since you reduce the spacing suddenly and then expand it immediately after. 00:22:685 (5) put this at x:272 y:120 instead
00:31:916 (5,6,7) - another jump thats a bit hard to perform, move 00:32:301 (7) a little closer
00:46:531 (1) - try ctrl+g, plays much better
00:50:762 (7) - add clap
00:58:839 (1,2,3,4,5,6) - i would rearrange this like this:
01:00:185 (9) - for better flow move to x:16 y:256
some of the jumps in this diff feel a bit forced, and i would avoid using very abrupt spacing changes unless the music asks for it.
protip: use grid size 4 when you map to make sure spacing is more precise on lower difficulties
Get a few more mods and you can call be for a recheck