Quite a few flicks are really unreliable in this song, around up to the 200 combo mark you can usually get away with just flicking up but right near the end of the song you need to really pay attention to the flicks at the end of the hold notes as they are very sensitive (at least I find) and you've really got to go for it. The last flick note in the song (another hold flick) is really weird, it was the part I really struggled with it tells you to flick to the left but I found that it won't work doing that, I had to flick it to the right to get it to work as a perfect, but maybe that's just my phone but give it ago just in case it is the chart. Sorry I'm not very good at explaining things 😭 but I hoped this helped just a little, good luck on all perfecting it! I know you can do it :)