first of all, this song you will find BGM beat every 1/4, but only some of it can be use. (Do not count very low beat as BGM beat because if you do that, you can place note on every blue stick)
there is main beat (white) sub beat(almost every red and some blue) and low beat (on most blue, you can't use this)
Hard
00:04:631 - low beat note but three blue stick after this are able to place note
00:06:038 - placable, just to tell u.
00:09:553 (4) - can leave but i suggest you delete this [player will focus on "DO-RE-ME-DO"]
00:15:999 - sound is here not blue stick (try 25% with 5% note audio)
00:16:584 (5) - normally slider didn't start on blue stick except some reason but i dunno the reason why you place slider on this
00:25:725 - i suggest deleting this (up to you, i just think it strange with no reason)
00:31:819 - i suggest this blue stick is a note or starting of slider, not an ending
00:32:991 - there is BGM sub beat here, place a note if you can
00:33:225 - this is low BGM beat, do not place any here
00:39:084 - this can be use[up to u]
00:39:553 - not sure
00:40:256 - low beat. can't use to end slider, but due to lyrics u can place a note or start slider here
00:41:194 (10) - not sure(i thought it too low)
00:42:366 - this place must be USE, it has very loud voice.
00:42:834 - low BGM beat again
00:47:756 - i suggest use jump on this, cos this note is on bluestick due to lyrics only[you place note here because you focus on lyrics not BGM]
00:49:631 - suggest delete this [up to you again, my reason is there is low BGM beat but i thought you may want tripple beat here]
00:51:506 - low BGM beat
00:52:678 - same
00:58:537 - just tell that you can place a note if you want
01:04:631 - and a blue stick after this is low BGM
01:08:381 - low again
01:09:318 - starting of slider not ending
01:10:256 - same
01:15:881 (5) - i suggest you change slider to two note [blue and white] because blue that this slider end is low BGM and it will be easier to do triple beat on next combo
01:19:396 - delete this[but other blues are fine]
01:20:568 - shorten slider
01:22:443 - again, not ending but starting or u can combine to reverse slider
01:32:638 - this and blue after this must have notes
just to know that a note in between stream but i tell you to delete mean that you can leave [cos a note can be place for funnier reason]
sorry that i can't mod below 4.5 star diff [because i can't play well]