JS1k: The JavaScript code golfing competition

for(_='round~erVinnVU.UHTMLR1]RQ(l)Pp[O",NorMath.randoma.y(e.y-)timetion/2,en(e.x-x)()funcN0,{})p.splice(=m/1E3*k*p.push(n();.style.=parseInt(;f.	(a){p.fEach(Nch"#)+"px"var =pVfmance.now(p.lgth-requestAnimaFrame(x)
c=UWidth,h=UHeight,k=c/12,m;bbackg~="#000";bovVflow="hidd"; n(a,e,g,l,q,y){f=d.createElemt("div")	UHTML=a	style.posi="absolute"	style.lefte	style.bottomg	style.col=l	b=q	c=0	x=e	y=g	move=y	a=1;b.appdChild(freturn f}f(p=[n("MFFF,n("0Nc-k,h-k,"#FF0],r=,t=cos,u=sin,v=0;9>v;v++)String.fromCharCode(65+25*r),r*c,r*h,"#F5"+v,0,e=x-cg=-hl.01*a,q=e*tP-g*uP,e=g*tP+e*u(lx=q+c/2;=e+h/2}) w{"|"!=OQ&&"|05FN2,+b;f(e,g=2;g;g--)if(e=Og],sq=*+*,300>sq){Og]R="";g,1=h+1;OQOQ)+100;break}>h&&1,1)}))}documt.addEvtListV("keydownNswitch(keyCode){case 32:w}} x{m=-A;A=;move(aaleftx;abottom}
}setIntVval({a=~()?1:-1})},3E3A
;';G=/[^ -MSTW-}]/.exec(_);)with(_.split(G))_=join(shift());eval(_)

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

var w = innerWidth;
  var h = innerHeight;
  var u = w/12;
  var diff;
  b.style.background = "#000";
  b.style.overflow = "hidden";

  var createElement = (ship, x, y, color, v, move) => {
    var el= d.createElement('div');
    el.innerHTML=ship;
    el.style.position="absolute";
    el.style.left = parseInt(x)+"px";
    el.style.bottom = parseInt(y)+"px";
    el.style.color = color;
    el.v = v;
    el.rv = 0;
    el.x = x;
    el.y = y;
    el.move = move;
    el.spin = 1;
    b.appendChild(el);
    return el;
  }

  var move = (el) => {
    el.move(el);
    el.style.left = parseInt(el.x)+"px";
    el.style.bottom = parseInt(el.y)+"px";
  }

  var Elements = [
    createElement("M", w/2, h/2, "#FFF", 0, () => {}),
    createElement("0", w-u, h-u, "#FF0", 0, () => {})
  ];

  var ra = Math.random;
  var co = Math.cos;
  var si = Math.sin;
  for (var i=0; i < 9; i++) {
    Elements.push(createElement(
      String.fromCharCode(65+ra()*25), ra() * w, ra() * h, "#F5"+i, 0,
       (el) => {
         var x = el.x - (w/2);
         var y = el.y - (h/2);
         var f = u * (diff/1000) * .01 * el.spin;
         var px = (x * co(f)) - (y * si(f));
         var py = (y * co(f)) + (x * si(f));
         el.x = px + (w/2);
         el.y = py + (h/2);
       })
    );
  }

  var shoot = () => {
    if (Elements[Elements.length-1].innerHTML == "|") {
      return;
    }
    Elements.push(createElement(
      "|", w/2, h/2, "#05F", 2, (el) => {
        el.y += el.v * u * (diff/1000);
        var e, x2, y2;
        for (var i = Elements.length-2; i; i--) {
          e = Elements[i];
          sq = ((e.x - el.x) * (e.x - el.x)) + ((e.y - el.y) * (e.y - el.y));
          if (sq < 300) {
            Elements[i].innerHTML="";
            Elements.splice(i, 1);
            el.y=h+1;

            Elements[1].innerHTML = parseInt(Elements[1].innerHTML) +100;

            break;
          }
        }
        if (el.y > h) {
           Elements.splice(Elements.length - 1, 1);
        }
      }
    ));
  }

  document.addEventListener('keydown', function(event) {
      switch(event.keyCode) {
        case 32:
          shoot();
          break;
      }
  });

  var loop = () => {
    time = performance.now();
    diff = time - old_time;
    old_time = time;
    Elements.forEach((v) => {
      move(v);
    })

    requestAnimationFrame(loop);
  }

  setInterval(() => {
    Elements.forEach((v) => {
        v.spin = Math.round(Math.random())? 1: -1;
    })
  }, 3000);

  var old_time=performance.now();
  requestAnimationFrame(loop);