00:08:264 (8264|2,8264|3,8264|0,8598|1,8598|3,8598|0,8931|2,8931|3,8931|0,9264|1,9264|0,9264|3) - you use triples for snare sound, this is not snare. In addition, there's a 1/2 in background so why not use it to make sort of jumptrill? You can do [12][12][34][34] or similar stuff if you don't want to go with cheap jumptrill pattern.
00:09:681 (9681|1,9764|2,9848|3,9931|2,10014|1,10098|0,10181|1,10264|2,10348|1,10431|0,10514|1) - I don't feel this pattern has the right balance with rhythm, it gives accents in weird places (turning points are the accents).
I'd suggest something like trills, maybe 424231314321[34]? seems more natural and fitting for me.
00:17:431 - 00:17:514 - you should map these two notes because you accented 00:17:764 (17764|2,17848|1) - these two as well, to be consistent with what you map and what not.
00:24:931 (24931|1) - is better in 3 to make the chord switch middle columns. If you don't want this, move 00:24:598 (24598|1,24931|1,25264|1) - to 3 to correspond with 00:24:264 (24264|2) - .
00:26:264 (26264|1) - I feel like this note is not needed, there's no strong sound.
00:29:681 (29681|2,29848|2,30014|2,30181|2) - this is rather hard to execute on a HD difficulty, try this, feels more natural:
00:31:098 (31098|3,31181|2) - 00:31:098 (31098|3,31181|2) - move one column to the left, 00:31:264 (31264|1) - to 4 and 00:31:431 (31431|3) - to 2. It makes a nice flowing pattern.
00:34:264 - add a note.
00:34:931 - I suggest taking the pattern I suggested above, ctrl+H it and paste in this section. Current pattern is.... not very good, 00:36:264 (36264|1,36264|0,36431|3,36514|2,36598|1,36598|0,36681|2,36764|3,36848|2,36931|0,36931|1,37014|2,37098|3) - mainly because of this and seeming randomness of it. (it doesn't follow pitch or really anything)
00:37:264 - there should be a LN like before. It's the same.
00:39:598 - add a note.
00:44:931 - ^
00:45:598 - what happened to this section? it is so random, map it like section before please.
00:50:014 - it flows better if you add a note here.
00:50:264 (50264|1,50598|2) - ctrl+H these to make it play more comfortable.
00:50:848 (50848|0) - this note is not really important here, delete it.
00:52:681 - as above
00:53:098 (53098|3) - the first chord is more important, so I would delete this note to show which one is stronger.
00:53:431 (53431|2,53514|1) - delete these, sounds are very weak here.
00:54:014 - as above
00:54:764 - 1/4 starts here and continues also 00:55:181 - and 00:55:348 -
00:57:098 (57098|3) - like before
00:57:598 (57598|3,57598|1,57848|2,57931|3,57931|0,58098|2,58181|1,58264|0,58264|3) - please map this accordingly to the music, it feels really bad.
01:13:098 (73098|0,73264|0) - this is very weird to play, suggesting to change the pattern.
01:17:598 (77598|3,77681|2,77764|1,77848|0,78098|0,78181|1,78264|2,78348|3,78431|0,78514|1,78598|2,78681|3,78764|2,78848|1) - why did you map different sounds in the same section as before?
01:18:931 (78931|0) - begins 01:18:764 - here
01:20:264 - should be at least a double.
01:26:931 (86931|3) - it's better with a normal note.
01:37:514 (97514|3,97598|2,97598|0,97709|2,97709|0,97820|1,97820|3,97931|1,97931|3,98042|2,98042|0,98153|0,98153|2) - make this pattern 2 [34] [34] [34] [12] [12] [12]
01:38:431 (98431|2) - it starts 01:38:598 - here.
01:53:598 - what happened here? I don't know why it's different than the rest?