In keyboard mode:
  
  Select button = 127 or 8 depending on environment (browser gives 8)
  Start button = 10 or 13 dependoing on environment (browser gives 13)
  
  Letter buttons:
    
    Y = 4 (52)
    B = 3 (51)
    A = 2 (50)
    X = 1 (49)
  
  Upper Triggers:
    
    Left = 5 (53)
    Right = 6 (54)
      
  Lower Triggers:
    
    Left = 7 (55)
    Right = 8 (56)
    
  Main joystick:
    
    Up = w (119)
    Right = d (100)
    Down = s (115)
    Left = a (97)
   