[Insane]
00:35:781 (1,2) - spacing here can be like 00:16:418 (4,5) - because now you have it like here 00:41:781 (3,1) - and it is stronger.
only thing that caught my eyes xd nice diff
[Hard]
00:11:509 (1,2) - separate them a bit more, reading will improve, also visuals http://i.imgur.com/gSBhLS9.png
00:16:690 (4,5) - same http://i.imgur.com/drgCdID.png
[Normal]
00:11:509 i dont like soft whistle spam in this section, it hits my ears, consider removing some. for example you can keep it only for piano 00:11:509 (1,3,4,1,3,4,1) -
00:35:781 (1,2) - spacing here can be like 00:16:418 (4,5) - because now you have it like here 00:41:781 (3,1) - and it is stronger.
only thing that caught my eyes xd nice diff
[Hard]
00:11:509 (1,2) - separate them a bit more, reading will improve, also visuals http://i.imgur.com/gSBhLS9.png
00:16:690 (4,5) - same http://i.imgur.com/drgCdID.png
[Normal]
00:11:509 i dont like soft whistle spam in this section, it hits my ears, consider removing some. for example you can keep it only for piano 00:11:509 (1,3,4,1,3,4,1) -