OVER!!

00:03:518 - Remove whistle since there is no reason for feedback on spinner end. The song doesn't contribute anything towards it.

00:03:994 (4) - I think it would make more sense to make a change in the shape of the slider to make it more intentional.

00:05:422 - You should follow this actively since you're doing it for the rest of these pianos.

e.g. - 00:04:470 (1) - 00:04:946 (2) -

00:06:375 (8,1) - It's a little far, so how about we flip it around?

00:14:153 (6) - NC + Remove NC on 00:14:629 (1) -

00:17:803 (3,4) - Changing from the stack and jumping it up a bit would emphasize the vocals a bit, and would be a good stepping stone to the next section.

00:21:295 - Replace for a circle instead? Then you can follow the higher pitched vocal at 00:21:454 - with like a longer slider or something, as of right now the rhythm prioritization feel really weird and random.

00:21:613 (1,2,3,4) - Like you start following the 1/1 clicks here without ever doing it from before.

00:33:041 (3,4,5,6) - Increase spacing on this pattern to help support the buildup in the music?

00:38:121 (5,6,7) - Personally, it doesn't sound like there's enough sound to make me jump, so I think it's better to play it on FLOW AIM　

00:43:196 (3) - The reverse slider requires the player to stop the AIM, which increases the demands on the player, so it would be more helpful to simply let the player jump.
It also allows the player to express the strength and weakness of the song by the size of the jumps.

00:43:512 (5,6) - Is rather too spaced for what the song warrants. I would lower spacing on 00:43:512 (5) - by quite a bit.

01:09:845
That is debatable.
01:10:563 (2,3,4) - I would say overmapping because there is no piano sound here.
So I'm not sure how to cut a series of notes once and be true to the sound.

Alternatively, you could make overmapping good and circle 01:11:520 as well, continuing the series of notes and making it the best part of the score.

Either way, I think it would work.

01:09:845 (1,2,3,4,5,6,7,8,1,2,3,4,5,6,1,2,3,4,5,6,7,8) - Crescendo starts on blue tick at 01:09:765.

Additionally, it could also use some hitsounds since it's pretty blank in terms of feedback.

01:48:594 (1) - Could use similar spacing as 01:47:325 (1) -.