Moving on beat in this game is, admittedly, a bit strange. So, technically you always move on beat, but I wanted to give players some grace to deal with various forms of input lag and make the game more accessible to newer players. I had experimented with a few control schemes, and the one in the game is the one I found to be most responsive. The king always moves on beat, but the inputs can be fudged quite a bit. That said, you'll find the controls to be the most crisp if you go with the beat since (to oversimplify a lot) your inputs are queued if you aren't close enough to the rhythm.