Oh the bar was for spin and hp???
I was totally thrown off by the fact the bar filled up a few times before jumping right back to the middle where it started, as well as, how it seemed to me, like the special bonus point period started randomly after completing the bar and then the bar fell drastically so I assumed it was a kind of timer plus point counter thingy, but did not connect it with hp at all... and to be honest, I don't know how to gain or lose spin, I just kinda assumed it always spun somewhat randomly without me having any real influence or it having any effect...
