RKK: Shift, Alt, or Ctrl 'kicks' the climber's muscles (moves him) and once his hand moves over a lettered key you hit that letter to make it hold. And keep holding that letter -- or he'll lose the grip and fall. Then, while holding that letter, you SHFT to make him swing and target the next keystroke target. Once both hands are holding letters, you let the first one go and... continue. All the way watching out for rising water and, I'm sure, some surprises.