JS1k: The JavaScript code golfing competition

this.onload=function(){var m=document,b=m.getElementById('c'),c=b.getContext('2d'),v=10,r=['0110','1111','0110','1111'],e=['1111','0110','1111','0110'],i=0,j=0,k=0,f=[],o=Math.random,y=function(){f.push([~~(o()*56),-3]);},s=1,h=5,q=28,t=74,g=0,n=0,d=function(t,x,y,r){while(r[i]){j=0;while(r[i][j]){if(r[i][j]*1)t.fillRect(v*(x+j),v*(y+i),v,v);j++;}i++;}i=0;j=0;},w=function(){if(!s||n)return;c.clearRect(0,0,600,800);while(f[k]){f[k][1]++;if(Math.sqrt((f[k][0]-q)*(f[k][0]-q)+(f[k][1]-t)*(f[k][1]-t))<4){n=1;}d(c,f[k][0],f[k][1],e);if (f[k][1]>80){f.splice(k,1);k--;g++;}k++;}if(!(h%5)&&o()>0.3){y();}k=0;c.fillStyle=n?'red':'teal';d(c,q,t,r);c.fillStyle='#000';h++;m.title="Score: "+g;if(n){alert('Game Over. Your Score: '+g);m.location=m.location;}};b.setAttribute('width',600);b.setAttribute('height',800);m.addEventListener('keyup',function(e){if(e.keyCode==37){q--;if(q<0)q=0;}if(e.keyCode==39){q++;if(q>56)q=56;}},true);y();this.setInterval(w,50);}

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this.onload=function(){
var m=document,
    b = m.getElementById('c'),
    c = b.getContext('2d'),
    v = 10, //  Block size
    r = ['0110','1111','0110','1111'], // Car model one
    e = ['1111','0110','1111','0110'], // Car model two
    i = 0, // Counters
    j = 0, // Counters
    k = 0, // Counters
    f = [], // Cars positions
    o = Math.random,
    y = function() // Cars generator
    { 
        f.push([
            ~~(o() * 56),
            -3
        ]);
    },
    s = 1,
    h = 5, // Frame
    q = 28, // Main car position X
    t = 74, // Main car position Y
    g = 0, // score
    n = 0, // game over flag
    d = function(/* Context */t,/* Car X */ x, /* Car Y */ y, /* Car model */ r) // Draw car function
    {
        while(r[i]){
            j = 0;
            while(r[i][j]){
                if(r[i][j] * 1) t.fillRect(v * (x + j), v * (y + i), v, v);
                j++;
            }
            i++;
        }
        i=0;
        j=0;
    },
    w = function(){ // Frame function
        if(!s||n)return;
        c.clearRect(0, 0, 600, 800);
        while(f[k]){
            f[k][1]++;
            if(Math.sqrt((f[k][0]-q)*(f[k][0]-q)+(f[k][1]-t)*(f[k][1]-t))<4){ // Check collision
                n = 1; // game over
            }
            d(c,f[k][0],f[k][1],e); // Draw car
            if (f[k][1] > 80){ // Delete car out of screen
                f.splice(k,1);
                k--;
                g++;
            }
            k++;
        }
        if(!(h % 5) && o() > 0.3){ // generate random car 
            y(); 
        }
        k=0;
        c.fillStyle=n?'red':'teal';
        d(c,q,t,r); // Draw Main Car
        c.fillStyle='#000';
        h++;
        m.title = "Score: " + g; // Output info
        if(n){ // Gameover message
            alert('Game Over. Your Score: ' + g);
            m.location=m.location;
        }
    };
    // Init canvas
    b.setAttribute('width', 600);
    b.setAttribute('height', 800);
    
    // Init eventlistener
    m.addEventListener('keyup', function(e){
        if(e.keyCode == 37){
            q--;
            if (q < 0)q = 0;
        }
        if(e.keyCode == 39){
            q++;
            if (q > 56) q = 56;
        }
    },true);
    y(); // Draw first car
    this.setInterval(w, 50); // Init frame function
}