Oh no, did I go through the whole development with things backwards?
Hmm. It seems to do what I intended... It's relative to the direction you're traveling, so if you're moving upwards then left grabs the node to the left, right grabs the node to the right, but if you're moving down it's backwards. So the right button always swings clockwise, the left counter-clockwise.
OK, now I'm curious what you were expecting. Global left and right? That totally didn't occur to me, but it seems like it would be possible, though it might be a little weird when you're travelling mostly sideways. I'll have to try that, thanks.