As requested.
[General]
Inconsistent "Widescreen Support", you should remove it.
[Normal]
Placement01:01:635(5,7) Stack better.
00:29:999(4,2)^
01:01:098(6) NC here since 10 combos looks really long for Normal.
01:29:184(3) NC gere since the BPM has changed.
01:32:856(2,3) This flow looks really confused for playing, so maybe like this?
02:54:085(1,3) This ocerlap looks really confused for newbie, you must fix it.
Rhythm00:06:818(3,4) This is easiest diff so I don't suppose stack is better, and to follow the music, it sounds really better.
00:12:545(3) ^
01:35:305(5) Extend to 01:36:529 and remove note better.
Hit Sound02:04:611(2) Delete finish at end.
[Hard]
At least OD, HP 5 better, current is so easy.
Too random spacing, you should use Distant snap more positively and no huge jumps better.
Placement00:09:272(1) The overlap with (6) is not good and a bit invisiable.
01:29;796(2) ^
02:37:754(7,8)^
00:10:636(1,2,3,4,5) Too confused for playing, the spacing looks really randomly.
00:25:636(3) This jump looks not good and really ugly.There is no extra reason to make a huge jumping on here, so use current spacing here.
00:32:181(4)^
01:17:317(4)^
01:35:917(6)^
00:26:999(4) Spacing looks larger, it should be smaller spacing.
00:35:318(3,4) Why this spacing is different compared 00:32:727(1,2,3,4)? It is no sense I suppose.
00:56:453(1,2,3,4,1,2,3) Too confused placement again, try to put notes with regulated pattern.
01:04:635(3,4)^
Rhythm00:07:090(3,4) It is difficult for Hard diff since this reverses looks really confused.So I recommend this.
01:45:101(4,5) Try this ryhthm, it fits to music more properly.
Hit SoundSame as Insane.
[Insane]
PlacementYou can put notes more symmetrically, I suppose some notes looks not good placement and flow.One of ways to solve is to use tiny grid level.
00:13:090(1,2,3,4) Put these notes to be consistence on center line.
00:14:181(5,6) Stack accurately here if no intensional.
00:16:772(4) Move this direction like this, and the flow to (5) looks more fine.
00:25:090(2) The spacing gap from (1) to (2) and (2) to (3) looks odd since this part (1) to (4) is similar music, so I suppose you can move (2) a bit away better.
00:27:136(9) Not good jumping, it would not expect easier even if Insane since it begins on green line (1/4 line) so I just suggest you put this notes with previous spacing.
00:35:045(4,5)Again it looks not good flow because of spacing gap in stream part.
00:46:363(3,4,5) You must fix it, the overlap is really ugly and spacing looks really unreasonable.
00:48:272(1) Delete NC here, it isn't necessary.
02:21:468(1)^
00:49:490(1,2,3) This spacing looks really large, I know you mean but more smaller spacing would be better.
01:02:317(2) ^
01:22:635(3) NC here since BPM changed.
01:27:086(1) Again spacing looks odd, in this part there many BPM chnaged so you can put notes to be noticed for player.
Rhythm00:36:818(1) This note doesn't get ×0.80 slow velocity, you should resnap.
00:36:818~00:49:490 I don't suppose it is better to get larger spacing on slow part, it looks odd and not good for music.
00:52:500(4) object isn't snapped.
Hit SoundYou can put whistles more consistence, current sounds weird since I don't know what you followed on. So, I just recommend you to put whistles on piano instrumental.
You can improve this mapset more especially spacing and placement, at least stream should be same spacing if no particuler reason.
Good luck.