i did beat it. i kinda listened to the literal rythem of the music. theres 2 long bits, one where it resest the loop, after that one theres 2 spikes. i attacked on the 2nd spike and eventually won. no clue about the attacks i just kinda spammed randomly. couldnt let clovers food go to waste :)
As the dev said, the turn and damage are the only thing that matters. To give a hint, try to start the match using an attack that deals 3 damage. Next turn go for something that deals 4 if you have it.