GeneralTested out the difficulties, and even though it's less obvious on the easier difficulties, it's an issue for ranking.
The mapping starts at 00:00:019 and you have 0 AudioLeadIn. Even with all the loading and everything, I timed it on the Insane and the map starts after about 1 second or so, which is about 1000ms. You need at least 2000ms before the map. Change the AudioLeadIn to 2000 Easy00:10:685 (1) - use this shape:
00:22:352 (2,3) - the slider end is too far from the circle, the blanket is not perfect
00:34:018 (3,1,2) - check the spacing; though same time difference, 00:34:018 (3,1) are further from each other while 00:34:352 (1,2) are closer
00:58:685 (1) - the curve on the slider seems a little too off to look nice
Normal00:05:352 (1,2,3) - let 00:05:352 (1) slider end face downwards more, to make the slider look more evenly curved, the end looks misshapen at the moment. Shift 00:06:352 (2,3) down so the flow is not affected
00:13:018 (5,1) - blanket isn't even, shift the slider end closer to 00:13:018 (5)
00:21:018 (6,1) - uneven blanket
00:37:352 (1) - this 1/2 beat slider rhythm doesn't seem to fit the part
00:42:685 (1,2,3,4) - this whole whistle part just becomes awkward because you change the hitsounds after this part, making this part sound awful because it is different. You might as well start custom hitsounds 4 at 00:42:685 because of the quietness of 00:40:018 (1) which allows you to have a transition afterwards
00:56:018 - why the slow down in slider velocity? Music sounds the same, pace is the same, but I suddenly notice that the sliders are so much slower. The previous velocity was doing fine as it was. Keep the slider velocity the same as before the slowdown. Only slowdown at 01:04:018 because this is where the song starts to relax and have less pace/quieter
Cookiesi's Hard00:04:018 (5,6) - blanket these 2
00:14:352 (4,5) - this spacing doesn't really look good, they are too close to each other to seem pleasant
00:24:018 (1) - remove the whistle at the start of the slider, it doesn't sound like it fits
00:48:018 (2,3) - blanket them
01:04:018 (1) - remove all the whistles, they are too loud. In the first place, why should there be a 1/4 beat rhythm here when the music doesn't suit that
Insane00:47:018 - add a note here to go with the violins
00:50:852 - ^ the violins also already start here
Cookiesi's Duel00:45:352 (1,2,3,4,5) - this stream is unnecessary, this part of the song is mostly empty even, with no music
00:48:018 (1,2,3,4,5) - ^
00:53:018 (5) - the stream should only start here. The violin goes to 1/4 beats only at this part
00:58:018 (1,2,3,4,5,6,7,8,9) - overmapped
01:02:352 (1,2,3,4,5,6,7,8,9) - ^
01:10:685 (5,6,7,8) - ^
01:12:185 - add a note to go with the violin ending of this phrase
01:12:518 - violin starts the new phrase here, add a note
Continue to improve the song & Good Luck