JS1k: The JavaScript code golfing competition

var a=document,b=a.body.children[0],d=b.getContext("2d"),e,f,g=localStorage,h=g.getItem("s"),j=0,k=0,l=b.width=300,m=b.height=190,z="#000",n=[[150,60,3,3,2,5],[130,180,40,10,0,0]],o=n[1],p=n[0];for(c=0;c<5;c++)for(j=0;j<l;j+=30)n.push([j,c*10+10,30,10,0,0,"rgb(255,"+c*50+",0)"]);a.onkeydown=a.onkeyup=function(i){kc=i.keyCode;o[4]=i.type=="keydown"?kc==39?5:kc==37?-5:0:0};var q=setInterval(function(){try{d.clearRect(0,0,l,m);d.strokeRect(0,10,l,m-10);var i=n.length;for(j=0;j<i;j++){e=n[j];tx=e[0]+e[4];e.splice(0,2,e==o&&(tx<0||tx+e[2]>l)?e[0]:tx,e[1]+e[5]);d.fillStyle=e[6]||z;d.fillRect(e[0],e[1],e[2],e[3]);d.strokeRect(e[0],e[1],e[2],e[3]);if(j&&p[0]>e[0]&&p[0]+p[2]<e[0]+e[2]&&p[1]>e[1]&&p[1]+p[3]<e[1]+e[3]){if(e==o)p[4]=(p[0]-(o[0]+o[2]/2))/2.5;else{k+=60-e[1];n.splice(j--,1)}p[5]*=-1}}f=p[1]>m?"Lose":i==2?"Win":"";d.fillStyle=z;d.fillText(f?f:"Score:"+k,2,7);h=Math.max(k,h);d.fillText("Top:"+h,200,7);if(p[1]<13)p[5]*=-1;if(p[0]+p[2]>l||p[0]<0)p[4]*=-1;if(f){clearTimeout(q);g.setItem("s",h)}}catch(r){}},50);

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