well...it's highly recommend to compress the BG (or change to .jpg) because currently it's so large (1.5MB)
[Insane]
00:39:378 (1) - It seems that you didn't use soft-whistle in the map but it fits with the whistle-like sound in the music here (beginning of the slider)
00:43:128 - imo adding an extra note here sounds nice because the music is producing some drum streams and rush to the climax. You have put several 1/4 triplets to deal with the stream before so adding one here would sound suitable and smooth.
00:46:636 (7) - as mentioned by other modders before this one don't really looks good (and it overlaps with the scores which should be avoided), my idea is to curve it around (1), but no matter whether you think my idea is nice it's really highly recommended to change the slider placement...
01:23:410 (5) - This is hidden under (2) and I would say it potentially unrankable, just move it somewhere else
[Hard]
00:56:798 (1) - removing whistle at the beginning sounds nice
01:12:281 (1,1,1) - the douple whistle sounds a bit odd...imo emphasizing the first sound would be fine but double whistle is a bit over, so remove whistle in the slider?
[Normal]
00:56:798 (4) - same as [Hard] I would suggest removing whistle
In overall the map sounds really nice (except the slider touching the score), and for insane I guess you can find a bit more comment :3 (There're quite a lot of minor fix can be done to make stuffs symmetrical too -w-)
so good luck