Cat & Mouse. (2 player game)

<script src="http://koda.nu/simple.js">

  var cat = {x: 100, y: 100, speed :10};

  function update() {
   clearScreen();
   hideMouse();

   if(keyboard.a) {cat.x -= cat.speed;}
    if(keyboard.d) {cat.x += cat.speed;}
    if(keyboard.w) {cat.y -= cat.speed;}
    if(keyboard.s) {cat.y += cat.speed;}

    circle(cat.x, cat.y, 20, "black");
    circle(mouse.x, mouse.y, 20, "grey");

    if(distance(cat.x, cat.y, mouse.x, mouse.y) < 40)
    {
    stopUpdate();
    showMouse();
    text(mouse.x, mouse.y, 50, "The cat wins!", "green");
    }
  }

</script>