alright you asked for gameplay so i'll try to pay attention to that
00:01:726 (1,2,3) - its awkward how 1 is mapped to a piano sound, then 2 is mapped to a drum sound 1/2 after piano sound, and then 3 is mapped to piano sound again. i'd make all the heads piano, and map the drum sound with a tail for consistency. maybe something like this
same applies elsewhere in this section(e.g. 00:04:814 (2) - )
00:02:829 (3,1) - i'm fairly certain these are both placed 1/4 too late.
00:09:520 (1,2,3,4,5,6,7,8,1,2,3,4,5,6) - after the first 9 note stream, the player has to jump from the kickslider to the stream, but then the stream continues opposite the direction of movement leading into it, making the flow here awkward. there's plenty of other points in the map where the flow is awkward (e.g. 00:22:461 (5,6,7,8,9) - 00:27:167 (5,6,7,8,9) - 02:42:165 (1,2,3,4,5) - etc.) but there's also where it flows properly (e.g. 02:51:577 (1,2,3,4,5) - 05:09:515 (1,2,3,4,5) - ). check all the bursts in the map, there's quite a few more i didn't mention. change the direction and rotation of the stream to match the movement of the player leading into it, like this:
etc.
just as a note, awkward movements like 00:10:991 (6,1) - are fine since it's emphasizing the piano sound. the ones i pointed out above aren't.
00:19:226 (1,2,3,4) - i'd go for a stream here to match the piano. it's weird how there's stops when the piano is so prominent here
00:19:961 (1,2,3,4,5,6,7) - dont understand why this stream is like this. cool pattern but doesnt fit the song
00:39:373 (1,2,3,4,5,6,7,8) - i dont like how you started mapping the guitar sound but then switched to bass drum half way through. put slider heads on the guitar part and let the tails cover the bass drum, feels weird otherwise (or vice versa i suppose. doesn't matter what you do as long as you do it consistently)
01:08:196 (3) - emphasis is right but still undermapped. definitely need something on the white tick too. make this a repeat slider?
01:31:283 (1,2,1,2) - same thing i was mentioning earlier, you switched from guitar on slider heads to being on a tail. you probably still want a note on the snare hit, maybe change the second combo to 3 circles instead? inconsistent rhythm is present throughout this whole section, make similar changes
02:29:813 (1) - missing a bass drum sound on the white tick in the middle of this slider. change the way the sliders are mapped throughout this part too (repeats, change lengths, etc.)
03:36:870 (4) - avoid putting slider ends on snare sounds
03:58:341 (1,2,3,4,5) - i like the idea of having the kicksliders vary in length but it's not handled consistently. i'd put a jump on every bass & snare sound.
most of the problems after the second break are more of what ive mentioned above. focus on:
-making sure flow is good when entering streams & bursts
-making sure that you don't miss sounds within sliders
-making sure that rhythm with slider heads / tails is used consistently.
hopefully this helps!