01:24:456 (1,2,3,1,2,3) - 00:19:122 (1,2,3,1,2,3) - on these notes, hitsounds seems to fit too much with the music and dont provide too much feedback so u could add whitsle+clap on white ticks
metadata
#1 add "feat. 初音ミク" "feat. Hatsune Miku" to either artist or title
pretty explanatory
#2 remove source entirely, source is meant for videogames/shows, so add "プロジェクトセカイ カラフルステージ！ feat. 初音ミク" to source instead
#3 add these tags "Project Sekai Colorful Stage Proseka Female Vocal Japanese Pop Jpop J-pop Iki Ga Tsumaru No Breath"
#4 remove "hatsune miku" from tags since #1
02:31:137 - drums here get louder and louder in this section so u could add green lines here
i made green lines if you wanna copy and paste it into .osb file
[TimingPoints]
151137,-100,4,2,1,35,0,0
151316,-100,4,2,1,40,0,0
151494,-100,4,2,1,45,0,0
151673,-100,4,2,1,50,0,0
151851,-100,4,2,1,55,0,0
152030,-100,4,2,1,60,0,0
152205,-100,4,2,1,65,0,0
152387,-100,4,2,1,70,0,0
152476,-100,4,2,1,75,0,0
00:39:789 (3,1) - SOME newer players dont much have a sense of rhythm, so it would be much better if you removed these objects since theres not much important sound
00:46:664 (3) - u gotta move this perfect to the pixels x20 y206 it looks better (u could move 1 object somewhere else then place the note then place silder back)
00:33:227 (2) - there is no important sound yet u made a such of a big jump, you could nerf the 00:32:602 (1,2) - and move 00:33:539 (3,4,5) -
00:17:133 (3) - 00:17:914 (2) - add nc here and remove 00:17:602 (1) - here, it will look much better
02:30:727 (1,2,3,4,5,6) - I feel like there shouldnt be this big of a spike diff here, this and 02:34:477 (1,2,3,4,5) - have same sound but its different, it would be better if you placed silders instead of circle jumps
as for 01:36:939 - i made it a bit easier with less repeating sliders
for 02:01:419 (1) - the music doesnt really change that much, i think 1 repeating silder is enough for a normal diff