JS1k: The JavaScript code golfing competition

_='bP
b,ec.begbe};eP_c.close^
k,lvar n=r2;@k,l)Z(neP^pw
b 	pow(b,2D
(new DJe).valueOf^ K_@c00)RecNl=?c2:c3;(Y,llif(!o=,o!=nl&&($=sp/z,Vx-,V0<x?x-$:x+$,y=y-U,y=0<y?y-$:y+$,r=W(~y)),5>=r+a?=nl:(r=0>y?-1*r:r,ph7as(x/r)-sp/180*p%36V`sHy=U`cosH(x,y,a22))@c11)Zfont="20px Arial"TexN"Click globe!",5,w)}setTimeouNK,wnl=null;f=!1;t=!z=1w=2h=10down_=t;d=D^ up_jsp=(D-d)/h;{do ts=={x:y:Ua:	ceil(3|while(W(~Uy))>=a)}}0=4000"1=4993333"2=4EEE"G=[4CCCCBB",49999CC"];jm=MJh;rd7random;W7Wrt;p7PI;r2=2*p;wd=a.width;Q=a.heigQX=wd/2Y=Q/2;7m(/2-w3=c.creJeLearGradienN5,h,5w,z,22>iFc3.addColorStop(iG[i]mV50sw=[];K
=function(Zfilli<mxFPJhZstroke+-2*|,)};;c){	m.sw[i]a.onmouse,co.for(i=arcpw(-ts.retuK()0;Style=b,e,g,wd,Q)in);0,mCcXsz$sC4"#7=	@bP(F;i++)H(ph),JatKrnNt(QhtUcYVx=WsqZ.^(_
`+r*	j=f;|*rd~x)+';for(Y in $='~|j`_^ZWVUQNKJHF@74$	
')with(_.split($[Y]))_=join(pop());eval(_)

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

bP=function(x,y){	// begins a canvas path - helper function
	c.beginPath();
	c.strokeStyle=x;
	c.fillStyle=y;
},
eP=function(){	// ands, strokes and fills a canvas path - helper function
	c.closePath();
	c.stroke();
	c.fill();
},
arc=function(x,y,z,h,i,j){	// draws a canvas arc -helper function
	bP(i,j);
	c.arc(x,y,z,0,h);
	eP();
},
pw=function(x){return m.pow(x,2)},
D=function(){return (new Date()).valueOf()},
rn=function(){	// main game loop function for drawing and all handling (saves space) 
	bP(c0,c0);
	c.fillRect(0,0,wd,ht);	// refresh background
	cl=(mC)?c2:c3;
	arc(cX,cY,sz,r2,cl,cl);	// snow ball is white while shaking, white point in the mid
	if(!mC){ 
			for(i=0;i<mx;i++){	// draw snow
				o=sw[i];
				if(o!=nl){
					sC=sp/z;
					x=o.x-cX;
					x=x>0?x-sC:x+sC;
					y=o.y-cY;
					y=y>0?y-sC:y+sC;
					r=sq(pw(x)+pw(y));
					if(r+o.s<=5) sw[i]=nl/*,nlCnt++*/;
					else{
						r=y<0?r*-1:r;
						ph=m.asin(x/r)-sp/180*p%360;
						o.x=cX+r*m.sin(ph);
						o.y=cY+r*m.cos(ph);
						arc(o.x,o.y,o.s,r2,c2,c2);
					}
				}
			}

		bP(c1,c1);
		c.font="20px Arial";
		c.fillText("Click globe!",5,w);
	}

	setTimeout(rn,w);
}

nl=null;	// init game variables,constants and pointers
f=false;
t=true;
z=10;
w=20;
h=100;

// appends mouse and touch (mobile devices) event for player handling
a.onmousedown=function(){mC=t;d=D();};

// sets new snow object array on mouseclick and initializes movement of snow
a.onmouseup=function(){mC=f;sp=(D()-d)/h;for(i=0;i<mx;i++)do{ts=sw[i]={x:((cX+sz)-2*sz*rd()),y:((cY+sz)-2*sz*rd()),s:m.ceil(3*rd())}} while(sq(pw(cX-ts.x)+pw(cY-ts.y))>=sz-ts.s)};

c0="#000",c1="#993333";c2="#EEE"; 	// game colors
cG=["#CCCCBB","#9999CC"];
mC=f;	// is mouse down?
m=Math;
rd=m.random;
sq=m.sqrt;
p=m.PI;
r2=2*p;
wd=a.width;
ht=a.height;
cX=wd/2;
cY=ht/2;
sz=m.min(wd,ht)/2-w;	// radius ball
c3=c.createLinearGradient(5,h,50,w,z,2);	// background gradient
for(i=0;i<2;i++)c3.addColorStop(i,cG[i]);
mx=500; // max snow
//nlCnt=0;		// counter variable for null snow objects
sw=[];
rn();