Hi Hitsu, I'll try my best!!
[Kantan]
00:10:130 - i think that this note should be d because (to me) it seems to have with this sound 00:09:553 the same relation as those 2 notes 00:11:861 (3,4) so if this 00:09:553 was a note i would have placed here k and than d as I said before.
Here 00:14:169 and here 00:14:746 i think there is the same couple as 2 mentioned before but since it is a kantan i can't tell you to place a note here 00:14:169 but according to the sound i think that there 00:14:746 a d would suit better
00:18:207 (10,11) - same^
Here 00:41:284 and here 00:50:515 those notes sound weired to me, i think that those 3 k 00:37:822 (32,33,35) lose continuity with that d.
00:45:322 I think that this note breaks a bit the structure used untill now but honestly I would't know how to map it differently so, maybe think a bit more to this part pls. 00:54:555 - same
00:56:717 - this note sounds to me different from 00:56:284 , same thng for 00:59:024 -
01:04:938 (64,65,66) - why didn't you do as here 00:55:707 (53,54,55) ?
01:14:169 (75,76) , 01:19:361 here there is the same issue as the beginning
[Futsuu]
00:10:130 as for the kantan, here I suggest d, same here 00:12:438 but here I would better suggest to make control+g 00:12:149 (7,8) to mark more the difference.
00:14:746 same as before and same here 00:16:765 (16,17)
same hing that repeats here 01:14:169
[Muzukashii]
00:02:197 (9,10) to me there should be the opposite sound so control+g.
00:40:274 (127) I think that this placement could be a bit confusing so i thought about moving this note to here 00:40:419 to follow the same structure used here 00:38:111 - but then the sound gets weired so don't actually know what to do with this part but I think it needs a check.
[Oni]
I don't really think I've ever seen 1/6 patterns inside a Oni, even tho there are some 1/6 inside maps under 5 stars, they do all take the name of Inner Oni. I don't mean that they are placed wrongly but I'm not sure that they are legit.
00:02:197 (9,10) suggest conrol+g as muzu
I think that doing control+g here 00:24:986 (138,139) would improve the flow cause this part seems a bit too "static" but don't follow this tip if you think that this makes no sense.
Hope It was useful!!