General-
You should add the creator's artistic name on tags, I found "kaichi" is the one who produced this song, so add him to tags on all diffs. He could be source if you agree with the source = producer/Tags = vocaloid thing though I won't ask you to do that.
Easy-
03:18:301 (1,1,1) -This is not passable for the easiest diff, specially at 173 BPM, take in mind spinners are difficult for newbies.
Normal-
00:50:892 (1) - feels a bit weird...
00:54:226 (1) - ^, You could possibly delete it and create a slider from 00:54:434 - to 00:54:851 -
01:38:393 (4) - Feels weird too, you could try
this instead.
y u z u k i's-
Hitsounds are waaaaay too loud on this diff D:! Please make them softer in sections like the start. I had to go lower my hitsounds volume just to test this ._.
03:02:348 (1,2,3,4) - Kinda on the edge..., why don't you try
this instead?
I must say this diff really caught my eye, it's very clever and intresting, please keep up making maps like this one.
Insane-
01:22:872 (8,1,2,3) - Looks weird to the eye, why is that new combo on (1)? It makes little sense to me at least ._., Uhhh, try to move it ether to 01:23:393 (3) - or to 01:22:872 (8) -
Popped over the bolded stuff on easy (yes, I asked before doing so). Doing the other mods would be cool to make this mapset better (specially on yuzuki's diff, that pattern is kinda borderline...). Call me when you've applied these mods and I'll come back and rebubble.