by keyboard, ^ v < > arrows thing and of course shift for focus (slowing the player). hmm i think Relax mod is like control the character by using a mouse (like CtB), because it's the easiest way to dodge danmaku.
edit: if this is happened, i'm going to be a danmakosu! mapper.
edit: if this is happened, i'm going to be a danmakosu! mapper.