JS1k: The JavaScript code golfing competition

var w=500,h=800,M=Math,P=[],K=0,C=250,B=[],O;dr(a);c.width=500;c.height=800;b.onkeydown=function(e){K=e.keyCode==39?1:0;}
var it=setInterval(function(){if(C<0||C>500||(C>O&&C<(O+10))){ko();clearInterval(it);}
if(K){C+=10;P.push(C);}else{C-=10;P.push(C);}
a.fillStyle='#FFF';a.fillRect(0,0,500,800);a.strokeText('Score : '+P.length,20,20);dr(a);pl(a);},100);function pl(c){for(i=P.length;i>0;i--){a.strokeStyle='#A62929';a.strokeText('❤',P[i],400+((i-P.length)*10));}}
function dr(a){a.strokeStyle='#000';B.push([(M.random()*(w-20))+10,h]);for(i=B.length-1;i>0;i--){a.strokeText('↥',B[i][0],B[i][1]+((i-B.length)*10));if((i-B.length)*10==-410){O=B[i][0];}}
for(i=0;i<h;i+=10){a.strokeText('↥',0,i);a.strokeText('↥',490,i);}}
function ko(){l=0;setInterval(function(){a.fillStyle='#FFF';a.fillRect(200,350,100,20);if(l){a.strokeStyle='#A62929';l=0;}else{a.strokeStyle='#380F0F';l=1;}
a.strokeText('GAME OVER!',220,370);},500);}

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

var w = 500,
    h = 800,
    M = Math,
    P = [],
    K = 0,
    C = 250,
    B = [],
    O;
dr(a);
c.width = 500;
c.height = 800;
b.onkeydown = function (e) {
    K = e.keyCode == 39 ? 1 : 0;
}
var it = setInterval(function () {
    if (C < 0 || C > 500 || (C > O && C < (O + 10))) {
        ko();
        clearInterval(it);
    }
    if (K) {
        C += 10;
        P.push(C);
    } else {
        C -= 10;
        P.push(C);
    }
    a.fillStyle = '#FFF';
    a.fillRect(0, 0, 500, 800);
    a.strokeText('Score : ' + P.length, 20, 20);
    dr(a);
    pl(a);
}, 100);

function pl(c) {
    for (i = P.length; i > 0; i--) {
        a.strokeStyle = '#A62929';
        a.strokeText('❤', P[i], 400 + ((i - P.length) * 10));
    }
}

function dr(a) {
    a.strokeStyle = '#000';
    B.push([(M.random() * (w-20)) + 10, h]);
    for (i = B.length - 1; i > 0; i--) {
        a.strokeText('↥', B[i][0], B[i][1] + ((i - B.length) * 10));
        if ((i - B.length) * 10 == -410) {
            O = B[i][0];
        }
    }
    for (i = 0; i < h; i += 10) {
        a.strokeText('↥', 0, i);
        a.strokeText('↥', 490, i);
    }
}

function ko() {
    l=0;
    setInterval(function() {
            a.fillStyle = '#FFF';
            a.fillRect(200, 350, 100, 20);
            if(l) {
                a.strokeStyle = '#A62929';
                l=0;
            } else {
                a.strokeStyle = '#380F0F';
                l=1;
            }
            a.strokeText('GAME OVER!', 220, 370);
    }, 500);
}