00:01:396 (1,2) - this pattern would look better like this https://media.discordapp.net/attachments/921479574594920449/1052561063989751958/image.png
00:18:477 (1) - https://media.discordapp.net/attachments/921479574594920449/1052562203775090718/image.png this slider would look much better like this.
00:20:956 - youre missing a pretty notable sound here, should atleast end the slider there. i know youre mostly focusing on vocals and the piano but here 00:18:972 (2) - you placed an object on the same sound. i would either make 2 circles or end the slider there.
01:49:975 (4,5) - 01:50:927 (4,5) - 01:51:880 (4,5) - 01:52:832 (4,5) - i would turn these circles into sliders because the circles here arent really mapped to anything, like how the circles on 01:53:070 (1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4,5,6,7,8,1,2,3,4) - are mapped to drums and pitch changes on the instrument
02:04:167 (1) - would make this wave and all the waves like it more curvy like 02:00:402 (1) - unless youre trying to go for something like "sound stronger and more noticable = curvier waves"
02:30:320 (5) - 02:32:166 (5) - 02:33:204 (1) - ok but these just look bad please curve them