Sorry that I'm late...
Some suggestions:
[General]
The end of the song is extremely weird imo...but, well it's fine maybe.
[Yuki's Easy]
Try to control your combo please. I guess combos between 3 and 5 should be fine for an easy.
00:02:244 (T) - Useless timing point?
00:49:752 (1) - A slider with 2 reverse arrows may be confusing for new players, I guess a long slider here?
01:02:384 (1) - ^
01:32:187 (1) - Too short for an easy, maybe a long slider?
01:36:924 (4) - Remove whistle and add a clap on the reverse arrow?
01:44:818 (1) - Too short for an easy, maybe a long slider?
01:46:595 (1) - I'm not sure, is that rankable?
01:47:779 (T) - Useless timing point?
[Kite's Normal]
01:28:239 (5) - Move the clap to the end?
01:28:634 (6) - ^
01:37:121 (3) - Move to 01:36:924.
Nice diff.
[Hard]
00:15:809 (x) - I expect a note here.
01:19:160 (x) - ^
01:28:437 (1) - Should move to 01:28:239 with 2 more repeat and, of course, you should make the before spinner shorter.
01:34:752 (5) - Needs clap badly.
01:38:305 (x) - I expect a note here.
01:38:502 (1) - Should ends on 01:39:983.
01:40:180 (1) - Should starts at 01:40:081.
01:47:384 (3) - Add clap to the beginning.
01:51:134 (1,1) - Same suggestion as before.
[Lunatic]
01:13:239 (9) - Why not a spinner like before?
01:19:160 (x) - I expect a note here.
01:38:601 (1,1) - Same suggestion as Hard.
01:47:384 (5) - Needs clap badly.
01:51:233 (1,1) - Same suggestion as Hard.
That's all~