Oh hi so this is like the only ever guide who will actually show you tips on how to S-rank
Here it is!

Dash your way out of danger
Literally the #1 tip is to DASH.
Literally just DASH.
This can save you from danger A LOT OF TIMES, so don't forget your spacebar or whatever button you set the dash or smthn

Big Reaction Time™
This is present on normal non-sweaty mode as well BUT it's EXTRA x4 important when you're trying to S-rank

For example, in Close to Me, there's this part where The Big Cube™ closes into walls and then proceeds to turn into a weird spikey cube and turning as if You Spin Me was on the disco
Well, the good tip is to stay close to The Big Cube™ in the bottom, and Big Reaction Time™ is crucial in this part, since weird spikey balls will come out of The Big Cube™ and you'll have to avoid it really quickly

And...
Literally like don't blink don't get distracted
DON'T BLINK. Who cares if your eyes are dying go cry
In all seriousness, don't get distracted on any other things (unless it's important). Big Reaction Time™ is also required here.

Yeah these ain't perfect but they're something atleast.
Goodbye