JS1k: The JavaScript code golfing competition

for(E='c.ZfillYZYStyle="XX#W);V)VU)/Tp=O=45Np&L=1K-=~~(J1920<HMath.G0,F=FD=(C&&B16I,r,||3210)BGabs(>u-12840,,,B()nK=8Va[ellipse(00)?.5:-.5;V>t-6<=lB1E3>=lg[*b+f]*Grandom()|0	"+(	)+",-3.2,3.2VZtK8,uNFvDw=+";ZbeginPath(VZd/4ZYRect(-15T;0<bB>bB0<fB>fb|Df|D(Xrgb(,,)",
onkeydown=onkeyuOb=>{a[b.which]=b.type[5]};var a=[],dDe,g=Array(0).Y(1),hK5FkK,l=,mNFnDp,	,M,y,PK5,AN0;setInterval(E=>{if(!n){W0";FF192F80VW9";for(i=0;0>i;i++)g[i]B15+i%*,*(i/|0)+h,,Vd%4g.unshift(g.pop(Uh+=k;v(u+=kVd%80(k*=-1Vfor(e=0;2>e;e++)96<(	
6+e%*,e/2*,,2UP,A,,4VL1L2?
64,),L4?>=I-l>=r-m):r=m):(Wfff",4,4)Uif(L4){I+=;HIO0Vvar bCr-hT,fCIO=0))}W611t,ut,ud/2Y(VW88fl,ml,m-d/4Y()}a[37]l-38]m-39]l+]m+=8V!a[]L4(p?p|=4:(I=l,r=m,O5UbCm-hT;fClDO3,IDl-=Uv--w?1==vt-=M,u-=y,0>tHt)6	):(vK,MCt-lT,yCu-mTVPJP>lAJA>m>P-l>A-m!(lmIr6=CL6Vd++},V';G=/[^ -AEIMPRS[-~]/.exec(E);)with(E.split(G))E=join(shift());eval(E)

Zm9yKEU9J2MuWmZpbGxZWllTdHlsZT0iWFgjVyk7VilWVSkvVHA9Tz00NU5wJkw9MUstPX5+KEoxOTIwPEhNYXRoLkcwLEY9RkQ9KEMmJkIxNh9JLHIsHnx8HTMyHDEwGylCGkdhYnMoGRocPhl1LRgxMjgXNDAWLBYsGywVQigUKRRuSxM9OFZhWxJlbGxpcHNlKBEwMBApPy41Oi0uNTsPE1YcPhl0LQ42EDw9bEIxRTM+PWwMZ1sbKmIrZl0LKkdyYW5kb20oKXwwCSIrKBcJKSsiCCwtMy4yLDMuMlZaB3RLOBAsdU5GdkR3PRcrBiI7WmJlZ2luUGF0aChWWhEFFWQvNAcRBFpZUmVjdCgDLTE1EFQWOzA8YkIfPmJCMDxmQhs+ZhRifERmfEQLFAIoWHJnYigILAgsCCkiLAMBb25rZXlkb3duPW9ua2V5dU9iPT57YVtiLndoaWNoXT1iLnR5cGVbNV19O3ZhciBhPVtdLGREZSxnPUFycmF5KB8wKS5ZKDEpLGhLNUZrSyxsPRcsbU5GbkRwLB4GFwksTSx5LFBLNRAsQU4wO3NldEludGVydmFsKEU9PntpZighbil7VxAwIjsDRkYxOTJGGzgwVlc5HCI7Zm9yKGk9MDsfMD5pO2krKylnW2ldQgMxNRAraSUbKhYsFiooaS8bfDApK2gsFiwWVmQlNB1nLnVuc2hpZnQoZy5wb3AoVWgrPWs7dh0odSs9a1ZkJTgwHShrKj0tMVZmb3IoZT0wOzIfED5lO2UrKyk5NjwoFwkaATYQK2UlFiobLGUvMhAqGywbLDJVA1AsQSwcLDRWTDEUTDI/AR42NCwcKSxMND8WPj0ZSS1sGhY+PRlyLW0TKTpyPW0pOihXZmZmIiwDHjQsNClVaWYoTDQpe0krPRY7SEkUTzBWdmFyIGJDci1oVBYsZkNJAk8LPTApKX1XNjExBXQsdQR0LHUVZC8yB1koVlc4OGYFbCxtBGwsbRUtZC80B1koKX1hWzM3XRRsLRIzOF0UbS0SMzldFGwrEhZdFG0rPThWIWFbHF0dTDQdKHAdDD9wfD00OihJPWwscj1tLE81VWJDbS1oVBY7ZkNsAgtETzMsSURsLT0WVXYdLS13PzE9PXYUdC09TSx1LT15LDA+dB1IdCkUBjYQCSk6KHZLLE1DdC1sVBwseUN1LW1UHFZQSlA+bA9BSkE+bQ8fPhlQLWwaHz4ZQS1tGiEoDA5sGG0OSRhyGjY9Q0w2E1ZkKyt9LB9WJztHPS9bXiAtQUVJTVBSU1stfl0vLmV4ZWMoRSk7KXdpdGgoRS5zcGxpdChHKSlFPWpvaW4oc2hpZnQoKSk7ZXZhbChFKQ==

if (window.c === undefined) c = document.getElementById('cvs').getContext('2d'); // shimmed

/*
    * Yars 1K by Jason "--jp" Plackey
    * jp [at] chicagowebexperts [dot] com
    *
    * For JS1k 2019 - X
    * Final packed entry size is 1024b.
    *
    * A tribute to an Atari 2600/Activision classic: Yars' Revenge.
    * Arrow keys move, space shoots and launches the cannon.
    *
    */            

onkeydown = onkeyup = e => { k[e.which] = (e.type[5]); }

var h = 1500;
var k = [];
var $ = 0;
var x, y;
var K = Array(160).fill(1);
var opts = { moving: 1, shifting: 1, btop: 150, bdir: 1 };
var P = { x: 128, y: 450, s:0 };
var C={};
var L = { x: 1800, y: 450, s:0, l:128+(Math.random()*128)|0 };
var T = { x: h, y: 450 };

var fire=function() {
    if (!(C.s&4))
    if (!C.s &&!(P.x >= 600 && P.x <= 1000)) {C.x=P.x;C.y=P.y;C.s=5;} else C.s|=4;
}

var keys = function () {
    if (k[37]) P.x -= 8;
    if (k[38]) P.y -= 8;
    if (k[39]) P.x += 8;
    if (k[40]) P.y += 8;
    if (k[32]) fire();

    var row = ((P.y - opts.btop) / 40);
    var col = ((P.x - h) / 40);

    if (row > 0 && row < 16 && col > 0 && col < 10) {
        row = row | 0;
        col = col | 0;
            if (K[row * 10 + col]) {
                K[row * 10 + col] = 0;
                C.s=3;C.x=0;
                P.x -= 40;
                x=128;
            }
    }
}

var drawProjectile=function() {
    // C.s: bit 0=visible, bit 1=type (0=bullet,1=cannon), bit 2=moving
    if (C.s&1) {
        if (C.s&2) {
            // cannon
            c.fillStyle = 'rgb(' + ((Math.random() * 128) | 0) + ',' + ((Math.random() * 128) | 0) + ',' + ((Math.random() * 128) | 0) + ')';
            c.fillRect(C.x, C.y, 64, 32);
            if (!(C.s&4)) C.y=P.y;
            else if(Math.abs(C.x-P.x)<=40 && Math.abs(C.y-P.y)<=40 ) P.s=1;
        } else {
            // bullet
            c.fillStyle = '#fff';
            c.fillRect(C.x, C.y, 4, 4);
        }
    }
    
    if (C.s&4) {
        C.x += 40;
        if (C.x>1920) C.s=0;

        // kill a brick regardless of proj. type
        var row = ((C.y - opts.btop) / 40);
        var col = ((C.x - h) / 40);

        if (row > 0 && row < 16 && col > 0 && col < 10) {
            row = row | 0;
            col = col | 0;
            
            if (K[row * 10 + col]) {
                K[row * 10 + col] = 0;
                C.s = 0;
                x=128;
            }
        }
    }
}

setInterval(function () {
    if (!P.s) 
    {
        c.fillStyle = '#000';
        c.fillRect(0, 0, 1920, 1080);

        // blockade
        c.fillStyle = '#932';
        for (i = 0; i < 160; i++) {
            if (K[i]) {
                c.fillRect(h + ((i % 10) * 40), ((i / 10) | 0) * 40 + opts.btop, 40, 40);
            }
        }

        // block opts.shifting
        if (opts.shifting && !($ % 4)) {
            K.unshift(K.pop());
        }

        // blockade opts.moving
        if (opts.moving) {
            opts.btop += opts.bdir;
            if (!L.s) L.y += opts.bdir; // move swirl with blockade
            if (!($%80)) opts.bdir*=-1;
        }

        // safezone
        for (y=0;y<21600;y++) {
            if (((Math.random() * 128) | 0)>96) {
                c.fillStyle = 'rgb(' + ((Math.random() * 128) | 0) + ',' + ((Math.random() * 128) | 0) + ',' + ((Math.random() * 128) | 0) + ')';
                c.fillRect(600+((y%40)*10), (y/200)*10, 10, 2);
            }
        }

        // tracer
        c.fillRect(T.x, T.y, 32, 4);

        drawProjectile();
        
        // draw swirl
        c.fillStyle = '#611';
        c.beginPath();
        c.ellipse(L.x, L.y, 40, 10, $ / 4, -3.2, 3.2);
        c.ellipse(L.x, L.y, 40, 10, $ / 2, -3.2, 3.2);
        c.fill();

        // drawPlayer
        c.fillStyle = '#88f';
        c.beginPath();
        c.ellipse(P.x, P.y, 40, 10, $ / 4, -3.2, 3.2);
        c.ellipse(P.x, P.y, 40, 10, -$ / 4, -3.2, 3.2);
        c.fill();
    }

    keys();
    
    // swirl movement/launch
    
    if (!L.s && (!--L.l)) {
        L.s = 1;
        L.dx = (L.x - P.x) / 32;
        L.dy = (L.y - P.y) / 32;
    } else {
        if (L.s == 1) {
            L.x -= L.dx;
            L.y -= L.dy;
            
            if (L.x < 0 || L.x > 1920) {L.x=1800;L.y=450;L.s=0;L.l=128+(Math.random()*600)|0 };
        }
    }

    T.x -= ~~(T.x>P.x)?.5:-.5;
    T.y -= ~~(T.y>P.y)?.5:-.5;

    // collisions
    if (Math.abs(T.x - P.x) < 16 && Math.abs(T.y - P.y) < 16 && !(P.x >= 600 && P.x <= 1000)) P.s = 1;
    if (Math.abs(L.x - P.x) < 32 && Math.abs(L.y - P.y) < 32) P.s = 1;
    if (Math.abs(L.x - C.x) < 32 && Math.abs(L.y - C.y) < 32 && (C.s&6)==6) P.s = 1;

    $++;
}, 16);