JS1k: The JavaScript code golfing competition

document.title="BauRush";m=Math;a.font="12px Arial";lf=ct=0;sf=[];px=200;c.height=c.width=400;function cr(x,y,r,d){a.fillStyle=d;a.beginPath();a.arc(x,y,r,0,m.PI*2,1);a.closePath();a.fill();}function bg(){for(var i=0;400>i;i++){a.strokeStyle="rgb(0,0,"+m.round((i/400)*255)+")";a.beginPath();a.moveTo(0,i);a.lineTo(400,i);a.stroke();}}function rn(){cr(px,300,15,"red");cr(px,285,4,"yellow");cr(px-5,295,4,"rgb(255,90,90)");}function tk(){a.clearRect(0,0,400,400);ct+=5;bg();rn();if((ct-lf)>((1/m.sqrt(ct))*m.pow(10,4))){lf=ct;sf.push(Array(m.floor(m.random()*400),0));}for(f in sf){sx = sf[f][0];sy=sf[f][1];if(sy<400){sf[f][1]++;cr(sx,sy,5,"white");if(((px-20<sx)&&(sx < px+20))&&((285<sy)&&(sy<315))){ alert("Game Over! Score: "+ct);lf=ct=0;px=200;sf=[];}}else{sf.splice(0,1);}}a.fillStyle="white";a.fillText("Alex Sc 2010",10,20);a.fillText("Don't get snow on the bauble! Score:"+ct,10,40)}setInterval("tk()",5);document.onkeydown=function(e){k=e.which;if((k==39)&&(px<380)){px+=20}if((k==37)&&(20<px)){px-=20}}

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