How do I walk slowly? I'm using my keyboard to play this, so it seems like I can only walk at one pace. Either I tap the button (which moves the monk forward a bit, but sometimes he inexplicably walks in the opposite direction afterwards) or I hit it for slightly too long and the petals disappear. The sign makes it obvious what I have to do, but I don't know how to do it.
http://s8.zetaboards.com/One_Piece_MUGEN/index/ - One Piece: Grand Line Bout (fangame covering the whole series as of now)