Hi megatopo, i strongly invite u to join the discord where u can find quick answer. The continuous slide u are talking about is call infinite sliding, it needs u to tap with good timing the slide button.

There is a link of a video : https://x.com/BenjaGaW/status/1712280395339690475?s=20 As he said on twitter, no need to alternate with another button, it was just to get a timing. For myself, i mostly listen to the slide sound, it helps me to know when to tap.