Player State Machine*

SketchSystems.spec

Player State Machine*
  Grounded*
    jump -> Airborne
    fall -> Airborne

    Idle*

     Moving

  Airborne
    land -> Grounded
    mount -> Walled    

    Airborne_Base*
      jump -> Ascending
      fall -> Descending

    Ascending
      apex -> Apex

    Apex
      fall -> Descending

    Descending

  Walled

SketchSystems_prototype.js

function render(model){
  let current_state_name = model.active_states[0].name;
  return $("h1",
           {style: {color: "darkBlue"}},
           `The current state is: ${current_state_name}`);
}