00:02:739 - What is the slider here for? I understand the slider before, at 00:02:364 , since there was a distortion in the sound, but I don't hear the same thing in the second slider. Consider removal.
00:03:114 - Maybe you could move the slider from 00:02:739 to here.
00:07:848 - Here, the snares you're mapping have an extra hit, so maybe you could put a note somewhere for that.
00:08:551 - Same for above, you could put a note here.
00:10:848 - ^
00:14:551 - Here and 00:14:739 , the bass kick is heavier than the other notes in this section, so maybe you could add a note on column 2 here, and then a note on column 1 at 00:14:739 .
00:15:676 - ^
00:21:489 - Here, there's actually four kicks in the song before 00:21:864 - you have only mapped two here. Maybe you could add notes on 00:21:582 and 00:21:770 to represent those kicks.
00:25:426 - Maybe add a note here, on column 3.
00:27:020 - I think you could remove the note here, as there's no corresponding sound in the song to go with it.
00:28:895 - Here you could add a note on column 2.
00:33:395 - The music has a kick here, so you should probably move the two notes from 00:33:489 to here
00:33:489 - After moving the two notes that were here, you could add a note on column 4 to fill the blank spot.
00:33:864 - Beginning here, the kicks that you have mapped feel off rhythm. I could try to explain it, but I think it would be better if I just showed you a picture of something that would play better:
00:34:989 - Starting here, the next four notes are kicks, so you can make them all jumps - i.e. two notes at once. If you followed the last point of advice, I'd suggest you have a 34,12,34,12 pattern, like so:
00:38:739 - Add a note here, on column 3.
00:44:739 - ^, same col.
00:47:739 - Starting here, the snares in the song actually follow a 1/6th pattern, so I would advise putting those in instead of the 1/4ths you have now.
00:50:364 - Alright, so at this point, if you listen closely enough, you can hear 1/8th snares in the background. I think, if you wanted to make this difficulty more challenging, you could map those out - kind of like the hardest diff of Marble Soda:
https://osu.ppy.sh/b/967907. Whether or not you map this is up to you, I just wanted to point it out. You could even have it as a fourth difficulty, or get someone to make a GD for you - or, you could just ignore it, which is fine too.
If you decide to map it out, however, there are a few other parts where you could do so as well, but I'm not going to mark them here, as it's not too hard to find.
00:58:051 - Starting here, there are 1/4th squeaks in the background slowly getting higher in pitch. I'd suggest mapping these out, maybe with a 1,2,4,3 pattern, but it's up to you. They end at 00:59:364 .
01:00:582 - Remove this note
01:01:989 - Here, you might want to move the note from column 3 to 2, then move the next note somewhere else. This note here is the same pitch as the three before it, so you should have it on the same column.
01:11:739 - Here, the next few kicks are actually 1/3rd notes, not 1/4ths like you have maps
01:14:176 - There's a kick here, so maybe add a note one column 2 or something
01:15:395 - There's also a kick here, so adding a note somewhere would be good, however I don't know how you could change the map around to fix this.
01:18:770 - There should be a note here, maybe on column 4?
01:20:645 - I don't hear anything here, so maybe remove this note.
01:21:864 - I don't really see the point of this slider here, as you could remap the build up without it to be even better. I'll let you decide on this one though
01:37:707 - Maybe move this note to column 2, as I feel the minijack should be after and not before
A note about the end: There's another section that you didn't map on any difficulty, and I feel like you could add a few more notes there so you didn't have to listen to that part at the results screen. However, it does change BPM (if i can tell), so it might be a bit of work - and if you don't want to, that's ok too.