JS1k: The JavaScript code golfing competition

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b.bgColorG#864';Lup=e=>No<2e.L;A=[];*8f^bG';<
8*(1+i/Ki*-512`['👻','👺'][
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8|0];K+
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-I-L^-`X-ZE-GN]/.exec(_);)with(_.split(G))_=join(shift());eval(_)

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/*

Abracadabra - Spook at the wizard library

A typing game in 1024 bytes of JavaScript with intro screen, voice over a spooky music and a cute wizard ready to save her school.

Quick! Type the name of the ghost, goblins, and ogres before they take the wizard library.

---

Thanks to my wife Joy, and daugther Vida, 6yo, for testing the game and serving as model for the cute wizard ;)

---

Mathieu 'p01' Henri - @p01 - http://www.p01.org

*/

b.bgColor = '#864';
onkeyup = e => K = o < 2 && e.key;
A = [];

// Goblins
for (i=0; i < 32 * 8; i++) {
  b = '';
  for (; b.length < Math.random() * 8 * (1 + i / 256);) {
    b += 'abracadabra'[Math.random() * 8 | 0];
  }
  A[i] = { d: i * 32 - 512, t: ['👻', '👺', '👹', '👹'][Math.random() * i & 3], b: b, s: 16 };
}
// The library
for (i = 0; i < 32; i++) {
  A[i]={ d: 256 + Math.random() * 256, t: '📚', b: ' ', s: 0 };
}
// Title
A[i] = { d: 0, t: 'abracadabra', b: ' ', s: 0 };
U = 'spook at the wizard library';
K = s = o = T = 0;

B = new AudioContext;
C = B.createScriptProcessor(32 * 32 * 2, 1, 1);
C.connect(B.destination);
C.onaudioprocess = e => {

  // Start ?
  if (!o && K) {
    K = o++;
    // Our wizard
    A[32].t = '👧🏻';
  }

  // clear
  a.width = 32 * 32 ;
  a.height = h = 32 * 32 * innerHeight / innerWidth;
  c.textAlign = 'center';

  // music (spooky theremin)
  D = e.outputBuffer.getChannelData(0);
  // the wooden floor
  for (i = 0; i < 32 * 32 * 2; i++) {
    T += 1 / B.sampleRate;
    D[i] = Math.cos(32 * 32 * T * (1 + Math.cos(T) / 32)) / 16;
    c.fillRect(1024 * Math.cos(i), i, 128, .2);
  }

  for (i = 0; i < 32 * 8; i++) {
    if (A[i].b) {
      x = 512 + A[i].d * Math.cos(i) + A[i].s * Math.cos(i + T);
      y = h / 2 + A[i].d * Math.cos(i + 8) + A[i].s * Math.cos(i + T + 8);
      t = A[i].b;
      if (o == 1 && A[i].s) {
        A[i].d -= 1 + i / 256;
        if (A[i].d < 0) {
          o++;
          U = 'the ' + A[i].t + ' took the library';
        }
        if (A[i].d < 512 && K == t[0]) {
          t = A[i].b = t.slice(1);
          ++s % 256 || (U = 'level ' + (1 + i / 256) + '. protect the library');
          if (!t) {
            A[i].t = '✨'
          }
        }
      }
      if (A[i].d < 32 * 32) {
        if (i == 32 && !o) {
          t = ['spook at the wizard library', 'press any key to start'][T & 1];
        }
        c.font = 32 + 'px cursive';
        c.fillText(t, x, y + 64);

        c.font = 64 + A[i].b.length * 8 + 'px cursive';
        c.fillText(A[i].t, x, y);
      }
    }
  }

  // score
  K = c.fillText(s, 256, o && h);
  // speech
  U = U && speechSynthesis.speak(new SpeechSynthesisUtterance(U));
}