Javascript cool application demo

Javascript cool application demo can be found here:
 http://js1k.com/2012-love/demos
Below is a simple music Javascript game from this demo: (Click color band to hear music)



Source code:
<script>

  math = Math;

for(tune = [hit = i = track = '']; i<32;)
  for(k = l = 11025,
      v = i?i-31&&(v+math.random()*3-1)%6|0:1,
      tune[i++] = v+1>>1; k--;)
    track += String.fromCharCode(
      math.sin('28?KTd'.charCodeAt(v)*k/597)
      *math.min((l-k)/83, k/l)
      *(i%2&&i%8-3?99:33)+128);

player = new Audio('data:audio/wav;base64,UklGRqSIFQBXQVZFZm10IBAAAAA\
BAAEARKwAAESsAAABAAgAZGF0YYCI' + btoa(' \0'+track+track+track+track));

///////////////////////////////////////////////////////////////////////////
/// Handle Clicks / Draw Stuff (146 bytes)
///////////////////////////////////////////////////////////////////////////

string = 4;

onclick = draw = function(x,y,w,h) {
  h ? a.fillRect(cwidth/2+x*scale-w/2,y,w,h)
    : w ? a.fillText(w,cwidth/2+x,194+y)
        : (y=(x.pageX-cwidth/2)/math.pow(1.01,x.pageY)+16>>3)>>2
            ?0: string = y
};

///////////////////////////////////////////////////////////////////////////
/// Game Loop (559 bytes)
///////////////////////////////////////////////////////////////////////////

setInterval(function() {
  step = player.currentTime%32*20|0;

  step | string&4 || player.play(hearts = 0, hit = 15, mult = 1);

  scale = 4;
  draw(y=0,0,cwidth=c.width=innerWidth,cheight=c.height=300);

  for(a.font = 4+a.font.slice(a.shadowBlur=1); y<cheight; y++)
    for(k = 5, scale /= .99,
        f = step+110-y/2, d = f/10|0,
        a.globalAlpha = y/cheight; k--;
        k-4 ? draw(k*2-3,y,1.2*scale,1)
        : y-198 || draw(0,y,260,4)&draw(cheight,103,'? '+(hit&&hearts))
          & draw(111,0,'? '+(step?mult:''))
          & draw(-130,-step*2,'chime  hero'))
      a.fillStyle = s = k-4 && f%10<8 | hit>=d | d>63 | d%4==1
        | k-tune[d%16*2] ? '#'+'fa33a0'.substr(k,3) : Q='#fff',
      a.shadowColor = k-string ? s : Q;

  if(n = step/5+1>>1)
    mult = n%4 && hit<n-3 ? 0 : mult,
    n%4-1 && hit<n & string==tune[n%16*2] && (hit = n, hearts += ++mult),
    player.volume = mult | !step ? 1:1e-8;

  string = 4
}, 50)
 </script>