NEON SURVIVORS v1.1 — full-featured bullet-heaven survivor game

Vanilla JS + Canvas, zero dependencies, offline-first PWA.

Gameplay:
- 11 weapons x8 levels + 11 evolutions (chest-based), incl. timed mines
- 13 passives, crit system with directional hit-sparks & hit-stop
- 10 characters w/ unique mods + unlock conditions, gold cosmetic skins
- 3 biomes (Neon Graveyard / Frozen Hollow / Magma Rift) each with own
  spawn tables, boss plans and music flavor; Endless mode + surges;
  4 difficulty grades; breakable crystal-lamp props
- Elite random affixes (Swift/Sturdy/Volatile), 4 bosses, win flow
- Achievements (23) w/ gold rewards, run history, daily seeded challenge

Tech:
- Cinematic canvas main-menu scene, game-feel FX suite (trails, muzzle,
  status tints, low-HP pulse), viewport culling + particle pooling
- WebAudio synth SFX + generative per-biome soundtrack
- Gamepad support, remappable keys, touch joystick, fullscreen
- i18n VI/EN, localStorage saves w/ export-import codes
- Cloudflare Workers leaderboard scaffold (KV) w/ signed submits
- Headless integrity test-suite (node test/integrity.js)

js/main.js

@@ -0,0 +1,33 @@
+'use strict';
+/* ============================================================
+   NEON SURVIVORS — main.js : bootstrap
+   ============================================================ */
+
+(function boot() {
+  Store.load();
+
+  const canvas = document.getElementById('game');
+  window.GAME = new Game(canvas);
+  UI.init(GAME);
+  GAME.applySettings();
+
+  // leave the splash
+  setTimeout(() => {
+    UI.showScreen('scr-menu');
+  }, 450);
+
+  // unlock WebAudio on first user gesture
+  const kick = () => { Snd.init(); };
+  window.addEventListener('pointerdown', kick);
+  window.addEventListener('keydown', kick);
+
+  // PWA service worker (https only; plain http still runs without SW)
+  if ('serviceWorker' in navigator && /^https:/.test(location.protocol)) {
+    window.addEventListener('load', () => {
+      navigator.serviceWorker.register('sw.js').catch(() => {});
+    });
+  }
+
+  // block context menu / double-tap zoom on mobile
+  window.addEventListener('contextmenu', e => e.preventDefault());
+})();