Simplify death screen restart and add biome parallax visuals

README.md

@@ -0,0 +1,47 @@
+# Dino Land
+
+No-build browser game using plain **HTML/CSS/JS/PHP**.
+
+## Run locally
+
+```bash
+cd "/Users/lawsonawhittington/.openclaw/workspace/Dino Land"
+php -S 0.0.0.0:8000
+```
+
+Open on the same machine: http://localhost:8000
+
+LAN test URL (from another device on your network):
+1. Find your LAN IP:
+   `python3 -c "import socket;s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM);s.connect(('8.8.8.8',80));print(s.getsockname()[0]);s.close()"`
+2. Open: `http://<YOUR_LAN_IP>:8000` (example: `http://192.168.1.25:8000`)
+
+## Controls
+
+- **Up Arrow**: jump
+- **Down Arrow**: duck
+- **Left Arrow**: walk backward
+- **Right Arrow**: walk forward
+
+## Gameplay Rules
+
+- TRex starts with **3 hearts**.
+- Moving forward earns score (**+1 per forward step unit**).
+- Water gaps cause instant death if landed in.
+- Ant collision costs 1 heart; jumping on ants crushes them.
+- Pterodactyls unlock after score > 100 (duck to avoid).
+- Meteors unlock after score > 250.
+- On death: top-10 leaderboard is shown; top-10 runs can be saved.
+
+## Leaderboard persistence
+
+- Backend endpoint: `api/scores.php`
+- Data file: `data/scores.json`
+
+## Quick verification checklist
+
+1. Start server and open game.
+2. Confirm score increases while moving right.
+3. Confirm hearts drop on ant / pterodactyl / meteor collisions.
+4. Confirm water causes immediate game over.
+5. Confirm leaderboard loads and score save works.

api/scores.php

@@ -0,0 +1,63 @@
+<?php
+declare(strict_types=1);
+
+header('Content-Type: application/json');
+
+$storageDir = __DIR__ . '/../data';
+$storageFile = $storageDir . '/scores.json';
+
+if (!is_dir($storageDir)) {
+    mkdir($storageDir, 0777, true);
+}
+if (!file_exists($storageFile)) {
+    file_put_contents($storageFile, json_encode([], JSON_PRETTY_PRINT));
+}
+
+function loadScores(string $file): array {
+    $raw = file_get_contents($file);
+    if ($raw === false || trim($raw) === '') {
+        return [];
+    }
+    $decoded = json_decode($raw, true);
+    return is_array($decoded) ? $decoded : [];
+}
+
+function saveScores(string $file, array $scores): void {
+    usort($scores, fn($a, $b) => ($b['score'] ?? 0) <=> ($a['score'] ?? 0));
+    $scores = array_slice($scores, 0, 10);
+    file_put_contents($file, json_encode($scores, JSON_PRETTY_PRINT));
+}
+
+$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
+
+if ($method === 'GET') {
+    $scores = loadScores($storageFile);
+    usort($scores, fn($a, $b) => ($b['score'] ?? 0) <=> ($a['score'] ?? 0));
+    echo json_encode(array_slice($scores, 0, 10));
+    exit;
+}
+
+if ($method === 'POST') {
+    $payload = json_decode(file_get_contents('php://input') ?: '{}', true);
+    $name = trim((string)($payload['name'] ?? 'Anonymous'));
+    $score = (int)($payload['score'] ?? 0);
+
+    if ($name === '') $name = 'Anonymous';
+    $name = mb_substr($name, 0, 20);
+    if ($score < 0) $score = 0;
+
+    $scores = loadScores($storageFile);
+    $scores[] = [
+        'name' => $name,
+        'score' => $score,
+        'date' => date('c')
+    ];
+
+    saveScores($storageFile, $scores);
+
+    echo json_encode(['ok' => true]);
+    exit;
+}
+
+http_response_code(405);
+echo json_encode(['error' => 'Method Not Allowed']);

data/scores.json

@@ -0,0 +1 @@
+[]

index.php

@@ -14,6 +14,33 @@
 
   <canvas id="game" width="960" height="540" aria-label="Dino Land game canvas"></canvas>
 
+  <div id="startScreen">
+    <div class="panel">
+      <h1>Start Dino Land</h1>
+      <form id="startForm">
+        <label for="startPassword">Password</label>
+        <input id="startPassword" type="password" required placeholder="Enter password" />
+
+        <label for="accessMode">Access Mode</label>
+        <select id="accessMode">
+          <option value="standard" selected>Standard (3 hearts)</option>
+          <option value="vip">VIP (6 hearts)</option>
+          <option value="vipPlus">VIP+ (9 hearts)</option>
+        </select>
+
+        <label for="difficulty">Difficulty</label>
+        <select id="difficulty">
+          <option value="easy">Easy</option>
+          <option value="medium" selected>Medium</option>
+          <option value="hard">Hard</option>
+        </select>
+
+        <p id="startError" class="error"></p>
+        <button type="submit">Start Game</button>
+      </form>
+    </div>
+  </div>
+
   <div id="deathScreen" class="hidden">
     <div class="panel">
       <h1>TRex Down!</h1>
@@ -25,7 +52,7 @@
         <input id="playerName" maxlength="20" required />
         <button type="submit">Save Score</button>
       </form>
-      <button id="restartBtn">Play Again</button>
+      <button id="restartBtn">Restart</button>
     </div>
   </div>
 

js/game.js

@@ -2,11 +2,101 @@ const canvas = document.getElementById('game');
 const ctx = canvas.getContext('2d');
 const scoreEl = document.getElementById('score');
 const heartsEl = document.getElementById('hearts');
+const deathScreenEl = document.getElementById('deathScreen');
+const finalScoreEl = document.getElementById('finalScore');
+const leaderboardEl = document.getElementById('leaderboard');
+const saveScoreFormEl = document.getElementById('saveScoreForm');
+const playerNameEl = document.getElementById('playerName');
+const restartBtnEl = document.getElementById('restartBtn');
+
+const startScreenEl = document.getElementById('startScreen');
+const startFormEl = document.getElementById('startForm');
+const passwordEl = document.getElementById('startPassword');
+const accessModeEl = document.getElementById('accessMode');
+const difficultyEl = document.getElementById('difficulty');
+const startErrorEl = document.getElementById('startError');
 
 const keys = new Set();
 const gravity = 1900;
 const groundY = 420;
-const worldWidth = 6000;
+const worldWidth = 13000;
+
+const DIFFICULTY = {
+  easy: {
+    moveSpeed: 0.88,
+    hazardSpeed: 0.75,
+    pteroSpawn: 3.0,
+    meteorSpawn: 2.25,
+    hitCooldown: 1.35,
+    pteroUnlock: 140,
+    meteorUnlock: 340
+  },
+  medium: {
+    moveSpeed: 1.0,
+    hazardSpeed: 1.0,
+    pteroSpawn: 2.2,
+    meteorSpawn: 1.5,
+    hitCooldown: 1.0,
+    pteroUnlock: 100,
+    meteorUnlock: 250
+  },
+  hard: {
+    moveSpeed: 1.18,
+    hazardSpeed: 1.35,
+    pteroSpawn: 1.45,
+    meteorSpawn: 1.05,
+    hitCooldown: 0.7,
+    pteroUnlock: 70,
+    meteorUnlock: 170
+  }
+};
+
+const BIOMES = [
+  { name: 'Plains', start: 0, end: 2200, sky: '#8ddcff', ground: '#88d34f' },
+  { name: 'Desert', start: 2200, end: 5200, sky: '#f4c983', ground: '#d5ad63' },
+  { name: 'Jungle', start: 5200, end: 8000, sky: '#6ecb8c', ground: '#3d8b4a' },
+  { name: 'Snow', start: 8000, end: 10400, sky: '#d5e9ff', ground: '#edf5ff' },
+  { name: 'Lava', start: 10400, end: worldWidth, sky: '#48302b', ground: '#6b3b32' }
+];
+
+let audioCtx = null;
+let gameConfig = { accessMode: 'standard', difficulty: 'medium' };
+
+function ensureAudioCtx() {
+  if (!audioCtx) audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+  if (audioCtx.state === 'suspended') audioCtx.resume();
+}
+
+function playSfx(type) {
+  try {
+    ensureAudioCtx();
+    const now = audioCtx.currentTime;
+    const osc = audioCtx.createOscillator();
+    const gain = audioCtx.createGain();
+    osc.connect(gain);
+    gain.connect(audioCtx.destination);
+
+    const presets = {
+      jump: { f0: 420, f1: 680, dur: 0.1, wave: 'triangle', vol: 0.06 },
+      squish: { f0: 180, f1: 120, dur: 0.12, wave: 'square', vol: 0.07 },
+      duck: { f0: 240, f1: 180, dur: 0.06, wave: 'sine', vol: 0.05 },
+      ptero_spawn: { f0: 520, f1: 460, dur: 0.1, wave: 'sawtooth', vol: 0.05 },
+      meteor_spawn: { f0: 300, f1: 200, dur: 0.14, wave: 'sawtooth', vol: 0.06 },
+      meteor_land: { f0: 140, f1: 70, dur: 0.18, wave: 'square', vol: 0.08 },
+      hit: { f0: 260, f1: 140, dur: 0.1, wave: 'square', vol: 0.06 }
+    };
+
+    const p = presets[type];
+    if (!p) return;
+    osc.type = p.wave;
+    osc.frequency.setValueAtTime(p.f0, now);
+    osc.frequency.exponentialRampToValueAtTime(Math.max(40, p.f1), now + p.dur);
+    gain.gain.setValueAtTime(p.vol, now);
+    gain.gain.exponentialRampToValueAtTime(0.0001, now + p.dur);
+    osc.start(now);
+    osc.stop(now + p.dur);
+  } catch (_) {}
+}
 
 const waterGaps = [
   { x: 700, width: 130 },
@@ -16,68 +106,256 @@ const waterGaps = [
   { x: 3900, width: 200 }
 ];
 
-const state = {
-  running: true,
-  dead: false,
-  deadReason: '',
-  lastTs: performance.now(),
-  score: 0,
-  stepCarry: 0,
-  cameraX: 0,
-  hearts: 3,
-  hitCooldown: 0,
-  ants: [
-    { x: 1000, y: groundY - 20, width: 22, height: 20, vx: -65, alive: true },
-    { x: 1750, y: groundY - 20, width: 22, height: 20, vx: -70, alive: true },
-    { x: 2600, y: groundY - 20, width: 22, height: 20, vx: -80, alive: true },
-    { x: 3400, y: groundY - 20, width: 22, height: 20, vx: -75, alive: true }
-  ],
-  pterodactyls: [],
-  pteroSpawnTimer: 0,
-  meteors: [],
-  meteorSpawnTimer: 0,
-  player: {
-    x: 160,
-    y: 0,
-    width: 64,
-    height: 76,
-    standingHeight: 76,
-    duckHeight: 48,
-    vx: 0,
-    vy: 0,
-    speed: 300,
-    jumpPower: 760,
-    onGround: true,
-    ducking: false
-  }
-};
-state.player.y = groundY - state.player.height;
+const lavaPuddles = [
+  { x: 10600, width: 120 },
+  { x: 11180, width: 180 },
+  { x: 11850, width: 130 },
+  { x: 12380, width: 180 }
+];
+
+const cacti = [
+  { x: 2500, width: 28, height: 80 },
+  { x: 2960, width: 32, height: 92 },
+  { x: 3480, width: 24, height: 76 },
+  { x: 4020, width: 30, height: 96 },
+  { x: 4630, width: 32, height: 85 }
+];
+
+const monkeys = [
+  { x: 5600, y: groundY - 150, width: 58, height: 42, vx: -140, range: [5450, 6050] },
+  { x: 6500, y: groundY - 165, width: 62, height: 44, vx: 120, range: [6320, 7000] },
+  { x: 7450, y: groundY - 152, width: 58, height: 42, vx: -130, range: [7250, 7800] }
+];
+
+const sabertooths = [
+  { x: 5900, y: groundY - 42, width: 90, height: 42, vx: -160, range: [5600, 6800] },
+  { x: 7100, y: groundY - 42, width: 96, height: 42, vx: 150, range: [6800, 7900] }
+];
+
+const mammoths = [
+  { x: 8450, width: 160 },
+  { x: 9300, width: 170 },
+  { x: 9950, width: 165 }
+];
+
+function getBiomeAt(x) {
+  return BIOMES.find((b) => x >= b.start && x < b.end) || BIOMES[BIOMES.length - 1];
+}
+
+function getMaxHearts(accessMode) {
+  if (accessMode === 'vipPlus') return 9;
+  if (accessMode === 'vip') return 6;
+  return 3;
+}
+
+function createInitialState(config = gameConfig) {
+  const maxHearts = getMaxHearts(config.accessMode);
+  return {
+    running: false,
+    dead: false,
+    deadReason: '',
+    lastTs: performance.now(),
+    score: 0,
+    stepCarry: 0,
+    cameraX: 0,
+    hearts: maxHearts,
+    maxHearts,
+    hitCooldown: 0,
+    floatingTexts: [],
+    ants: [
+      { x: 1000, y: groundY - 20, width: 22, height: 20, vx: -65, alive: true },
+      { x: 1750, y: groundY - 20, width: 22, height: 20, vx: -70, alive: true },
+      { x: 2600, y: groundY - 20, width: 22, height: 20, vx: -80, alive: true },
+      { x: 3400, y: groundY - 20, width: 22, height: 20, vx: -75, alive: true }
+    ],
+    monkeys: monkeys.map((m) => ({ ...m })),
+    sabertooths: sabertooths.map((s) => ({ ...s })),
+    mammoths: mammoths.map((m) => ({ ...m })),
+    pterodactyls: [],
+    pteroSpawnTimer: 0,
+    meteors: [],
+    meteorSpawnTimer: 0,
+    player: {
+      x: 160,
+      y: groundY - 76,
+      width: 64,
+      height: 76,
+      standingHeight: 76,
+      duckHeight: 48,
+      vx: 0,
+      vy: 0,
+      speed: 300 * DIFFICULTY[config.difficulty].moveSpeed,
+      jumpPower: 760,
+      onGround: true,
+      ducking: false
+    }
+  };
+}
+
+let state = createInitialState(gameConfig);
+let saveEligible = false;
+let scoreSavedThisRun = false;
+let saveInFlight = false;
+const saveScoreBtnEl = saveScoreFormEl.querySelector('button[type="submit"]');
+
+function setSaveFormBusy(isBusy) {
+  saveInFlight = isBusy;
+  playerNameEl.disabled = isBusy;
+  if (saveScoreBtnEl) saveScoreBtnEl.disabled = isBusy;
+}
 
 window.addEventListener('keydown', (e) => {
-  if (["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight"].includes(e.key)) {
-    e.preventDefault();
-  }
+  if (["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight"].includes(e.key)) e.preventDefault();
   keys.add(e.key);
-  if (e.key === 'ArrowUp' && state.player.onGround) {
+  if (e.key === 'ArrowUp' && state.player.onGround && state.running) {
     state.player.vy = -state.player.jumpPower;
     state.player.onGround = false;
+    playSfx('jump');
   }
 });
 window.addEventListener('keyup', (e) => keys.delete(e.key));
 
+startFormEl.addEventListener('submit', (e) => {
+  e.preventDefault();
+  const pass = passwordEl.value.trim();
+  if (pass !== '1027') {
+    startErrorEl.textContent = 'Wrong password. Try 1027.';
+    return;
+  }
+
+  gameConfig = {
+    accessMode: accessModeEl.value,
+    difficulty: difficultyEl.value
+  };
+
+  state = createInitialState(gameConfig);
+  keys.clear();
+  scoreSavedThisRun = false;
+  saveEligible = false;
+  setSaveFormBusy(false);
+  startScreenEl.classList.add('hidden');
+  deathScreenEl.classList.add('hidden');
+  state.running = true;
+  startErrorEl.textContent = '';
+});
+
+function restartToStartScreen() {
+  state = createInitialState(gameConfig);
+  keys.clear();
+  deathScreenEl.classList.add('hidden');
+  saveScoreFormEl.classList.add('hidden');
+  saveEligible = false;
+  scoreSavedThisRun = false;
+  setSaveFormBusy(false);
+  state.running = false;
+  state.dead = false;
+  accessModeEl.value = gameConfig.accessMode;
+  difficultyEl.value = gameConfig.difficulty;
+  passwordEl.value = '';
+  startErrorEl.textContent = '';
+  startScreenEl.classList.remove('hidden');
+}
+
+restartBtnEl.addEventListener('click', restartToStartScreen);
+
+saveScoreFormEl.addEventListener('submit', async (e) => {
+  e.preventDefault();
+  if (!saveEligible || saveInFlight || scoreSavedThisRun) return;
+  const name = playerNameEl.value.trim() || 'Anonymous';
+
+  setSaveFormBusy(true);
+  try {
+    const res = await fetch('api/scores.php', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ name, score: state.score })
+    });
+    if (!res.ok) throw new Error('Score save failed');
+
+    saveEligible = false;
+    scoreSavedThisRun = true;
+    saveScoreFormEl.classList.add('hidden');
+    await populateLeaderboard();
+  } catch (err) {
+    console.error(err);
+  } finally {
+    setSaveFormBusy(false);
+  }
+});
+
+function drawBiomeParallax(biome) {
+  const farOffset = -(state.cameraX * 0.15);
+  const midOffset = -(state.cameraX * 0.35);
+
+  if (biome.name === 'Plains') {
+    ctx.fillStyle = 'rgba(255,255,255,0.7)';
+    for (let i = -1; i < 6; i++) ctx.fillRect(((i * 220 + farOffset) % 1300), 70 + (i % 2) * 18, 120, 22);
+    ctx.fillStyle = 'rgba(72,140,72,0.55)';
+    for (let i = -1; i < 8; i++) ctx.fillRect(((i * 170 + midOffset) % 1500), groundY - 90, 90, 90);
+  } else if (biome.name === 'Desert') {
+    ctx.fillStyle = 'rgba(232,187,120,0.55)';
+    for (let i = -1; i < 7; i++) ctx.fillRect(((i * 190 + farOffset) % 1500), groundY - 120, 160, 120);
+    ctx.fillStyle = 'rgba(180,135,70,0.6)';
+    for (let i = -1; i < 10; i++) ctx.fillRect(((i * 140 + midOffset) % 1600), groundY - 70, 26, 70);
+  } else if (biome.name === 'Jungle') {
+    ctx.fillStyle = 'rgba(40,106,50,0.45)';
+    for (let i = -1; i < 9; i++) ctx.fillRect(((i * 150 + farOffset) % 1600), groundY - 170, 80, 170);
+    ctx.fillStyle = 'rgba(27,78,38,0.62)';
+    for (let i = -1; i < 12; i++) ctx.fillRect(((i * 118 + midOffset) % 1700), groundY - 115, 40, 115);
+  } else if (biome.name === 'Snow') {
+    ctx.fillStyle = 'rgba(255,255,255,0.75)';
+    for (let i = -1; i < 8; i++) ctx.fillRect(((i * 180 + farOffset) % 1600), groundY - 145, 140, 145);
+    ctx.fillStyle = 'rgba(196,220,242,0.7)';
+    for (let i = -1; i < 10; i++) ctx.fillRect(((i * 140 + midOffset) % 1700), groundY - 92, 95, 92);
+  } else if (biome.name === 'Lava') {
+    ctx.fillStyle = 'rgba(98,58,54,0.7)';
+    for (let i = -1; i < 8; i++) ctx.fillRect(((i * 185 + farOffset) % 1600), groundY - 150, 150, 150);
+    ctx.fillStyle = 'rgba(255,128,40,0.45)';
+    for (let i = -1; i < 14; i++) ctx.fillRect(((i * 112 + midOffset) % 1800), groundY - 85, 18, 85);
+  }
+}
+
 function drawBackground() {
-  ctx.fillStyle = '#8ddcff';
+  const camCenter = state.cameraX + canvas.width / 2;
+  const biome = getBiomeAt(camCenter);
+
+  ctx.fillStyle = biome.sky;
   ctx.fillRect(0, 0, canvas.width, canvas.height);
-  ctx.fillStyle = '#88d34f';
+  drawBiomeParallax(biome);
+  ctx.fillStyle = biome.ground;
   ctx.fillRect(0, groundY, canvas.width, canvas.height - groundY);
 
-  // Water gaps
+  // Water and lava pits
   for (const gap of waterGaps) {
     const sx = gap.x - state.cameraX;
     if (sx + gap.width < 0 || sx > canvas.width) continue;
     ctx.fillStyle = '#2e8bcf';
     ctx.fillRect(sx, groundY, gap.width, canvas.height - groundY);
   }
+
+  for (const lava of lavaPuddles) {
+    const sx = lava.x - state.cameraX;
+    if (sx + lava.width < 0 || sx > canvas.width) continue;
+    ctx.fillStyle = '#ff5f1f';
+    ctx.fillRect(sx, groundY, lava.width, canvas.height - groundY);
+  }
+
+  // Cactus decoration + hazard body
+  ctx.fillStyle = '#2a8f4a';
+  for (const c of cacti) {
+    const sx = c.x - state.cameraX;
+    if (sx + c.width < 0 || sx > canvas.width) continue;
+    ctx.fillRect(sx, groundY - c.height, c.width, c.height);
+    ctx.fillRect(sx - 8, groundY - c.height + 24, 8, 18);
+    ctx.fillRect(sx + c.width, groundY - c.height + 26, 8, 18);
+  }
+
+  ctx.fillStyle = '#0f0f0f';
+  ctx.font = 'bold 20px Arial';
+  ctx.fillText(`Biome: ${biome.name}`, 18, 70);
+  ctx.fillText(`Difficulty: ${gameConfig.difficulty.toUpperCase()}`, 18, 96);
+  const modeLabel = gameConfig.accessMode === 'vipPlus' ? 'VIP+ MODE' : gameConfig.accessMode === 'vip' ? 'VIP MODE' : 'STANDARD';
+  ctx.fillText(modeLabel, 18, 122);
 }
 
 function drawTRex(p) {
@@ -97,8 +375,46 @@ function drawAnts() {
     const sx = ant.x - state.cameraX;
     if (sx + ant.width < 0 || sx > canvas.width) continue;
     ctx.fillRect(sx, ant.y, ant.width, ant.height);
-    ctx.fillRect(sx - 4, ant.y + 6, 4, 4);
-    ctx.fillRect(sx + ant.width, ant.y + 6, 4, 4);
+  }
+}
+
+function drawMonkeys() {
+  ctx.fillStyle = '#6a3f1f';
+  for (const m of state.monkeys) {
+    const sx = m.x - state.cameraX;
+    if (sx + m.width < 0 || sx > canvas.width) continue;
+    ctx.fillRect(sx, m.y, m.width, m.height);
+    ctx.fillRect(sx + m.width / 2 - 3, m.y - 18, 6, 18); // vine
+  }
+}
+
+function drawSabertooths() {
+  ctx.fillStyle = '#c6884e';
+  for (const s of state.sabertooths) {
+    const sx = s.x - state.cameraX;
+    if (sx + s.width < 0 || sx > canvas.width) continue;
+    ctx.fillRect(sx, s.y, s.width, s.height);
+    ctx.fillStyle = '#fff';
+    ctx.fillRect(sx + s.width - 22, s.y + 26, 4, 12);
+    ctx.fillRect(sx + s.width - 14, s.y + 26, 4, 12);
+    ctx.fillStyle = '#c6884e';
+  }
+}
+
+function drawMammoths() {
+  for (const m of state.mammoths) {
+    const sx = m.x - state.cameraX;
+    if (sx + m.width < 0 || sx > canvas.width) continue;
+
+    // body
+    ctx.fillStyle = '#7c8ea1';
+    ctx.fillRect(sx, groundY - 130, m.width, 70);
+    // legs
+    ctx.fillRect(sx + 14, groundY - 60, 24, 60);
+    ctx.fillRect(sx + m.width - 38, groundY - 60, 24, 60);
+    // tusk hint
+    ctx.fillStyle = '#f3f3f3';
+    ctx.fillRect(sx + m.width - 6, groundY - 70, 8, 24);
   }
 }
 
@@ -108,8 +424,6 @@ function drawPterodactyls() {
     const sx = p.x - state.cameraX;
     if (sx + p.width < 0 || sx > canvas.width) continue;
     ctx.fillRect(sx, p.y, p.width, p.height);
-    ctx.fillRect(sx - 8, p.y + 6, 8, 4);
-    ctx.fillRect(sx + p.width, p.y + 6, 8, 4);
   }
 }
 
@@ -122,27 +436,72 @@ function drawMeteors() {
   }
 }
 
-function intersects(a, b) {
-  return a.x < b.x + b.width && a.x + a.width > b.x && a.y < b.y + b.height && a.y + a.height > b.y;
+function addFloatingText(x, y, text, color = '#ffe066') {
+  state.floatingTexts.push({ x, y, text, color, ttl: 0.8, vy: -36 });
 }
+function updateFloatingTexts(dt) {
+  for (const t of state.floatingTexts) {
+    t.ttl -= dt;
+    t.y += t.vy * dt;
+  }
+  state.floatingTexts = state.floatingTexts.filter((t) => t.ttl > 0);
+}
+function drawFloatingTexts() {
+  ctx.save();
+  ctx.font = 'bold 22px Arial';
+  ctx.textAlign = 'center';
+  for (const t of state.floatingTexts) {
+    const alpha = Math.max(0, Math.min(1, t.ttl / 0.8));
+    ctx.globalAlpha = alpha;
+    ctx.fillStyle = t.color;
+    ctx.fillText(t.text, t.x - state.cameraX, t.y);
+  }
+  ctx.restore();
+}
+
+const intersects = (a, b) => a.x < b.x + b.width && a.x + a.width > b.x && a.y < b.y + b.height && a.y + a.height > b.y;
 
 function updateHeartsUI() {
-  heartsEl.textContent = '❤'.repeat(state.hearts) + '🖤'.repeat(Math.max(0, 3 - state.hearts));
+  const active = '<span class="heart heart-active">❤</span>'.repeat(state.hearts);
+  const lost = '<span class="heart heart-lost">❤</span>'.repeat(Math.max(0, state.maxHearts - state.hearts));
+  heartsEl.innerHTML = active + lost;
 }
 
-function kill(reason) {
+async function loadTopScores() {
+  const res = await fetch('api/scores.php');
+  return res.ok ? res.json() : [];
+}
+
+async function populateLeaderboard() {
+  const scores = await loadTopScores();
+  leaderboardEl.innerHTML = '';
+  scores.forEach((s) => {
+    const li = document.createElement('li');
+    li.textContent = `${s.name} — ${s.score}`;
+    leaderboardEl.appendChild(li);
+  });
+
+  const qualifies = scores.length < 10 || state.score > (scores[scores.length - 1]?.score ?? -1);
+  saveEligible = qualifies && !scoreSavedThisRun && !saveInFlight;
+  saveScoreFormEl.classList.toggle('hidden', !saveEligible);
+}
+
+async function kill(reason) {
+  if (state.dead) return;
   state.running = false;
   state.dead = true;
   state.deadReason = reason;
+  finalScoreEl.textContent = `Final Score: ${state.score} • ${reason}`;
+  await populateLeaderboard();
+  deathScreenEl.classList.remove('hidden');
 }
 
 function applyHit(reason) {
   if (state.hitCooldown > 0 || state.dead) return;
   state.hearts -= 1;
-  state.hitCooldown = 1.0;
-  if (state.hearts <= 0) {
-    kill(reason);
-  }
+  state.hitCooldown = DIFFICULTY[gameConfig.difficulty].hitCooldown;
+  playSfx('hit');
+  if (state.hearts <= 0) kill(reason);
 }
 
 function isOverWater(player) {
@@ -150,16 +509,20 @@ function isOverWater(player) {
   return waterGaps.some((g) => centerX >= g.x && centerX <= g.x + g.width);
 }
 
+function isOverLava(player) {
+  const centerX = player.x + player.width / 2;
+  return lavaPuddles.some((l) => centerX >= l.x && centerX <= l.x + l.width);
+}
+
 function updateAnts(dt) {
   const p = state.player;
   const prevBottom = p.y + p.height - p.vy * dt;
 
   for (const ant of state.ants) {
     if (!ant.alive) continue;
-
     ant.x += ant.vx * dt;
     if (ant.x < 200) ant.vx = Math.abs(ant.vx);
-    if (ant.x > worldWidth - 200) ant.vx = -Math.abs(ant.vx);
+    if (ant.x > 5100) ant.vx = -Math.abs(ant.vx);
 
     if (intersects(p, ant)) {
       const playerBottom = p.y + p.height;
@@ -167,6 +530,9 @@ function updateAnts(dt) {
       if (stomped) {
         ant.alive = false;
         p.vy = -380;
+        state.score += 50;
+        addFloatingText(ant.x + ant.width / 2, ant.y - 10, '+50', '#ffe066');
+        playSfx('squish');
       } else {
         applyHit('A swarm of ants got you.');
       }
@@ -174,45 +540,107 @@ function updateAnts(dt) {
   }
 }
 
-function updatePterodactyls(dt) {
-  if (state.score <= 100) return;
+function updateCactus() {
+  const p = state.player;
+  for (const c of cacti) {
+    const hitbox = { x: c.x, y: groundY - c.height, width: c.width, height: c.height };
+    if (intersects(p, hitbox)) applyHit('Cactus spike!');
+  }
+}
 
+function updateMonkeys(dt) {
+  const p = state.player;
+  for (const m of state.monkeys) {
+    m.x += m.vx * dt;
+    if (m.x < m.range[0]) m.vx = Math.abs(m.vx);
+    if (m.x > m.range[1]) m.vx = -Math.abs(m.vx);
+
+    if (intersects(p, m) && !p.ducking) {
+      applyHit('Monkey swing! Duck under them.');
+    }
+  }
+}
+
+function updateSabertooths(dt) {
+  const p = state.player;
+  for (const s of state.sabertooths) {
+    s.x += s.vx * dt;
+    if (s.x < s.range[0]) s.vx = Math.abs(s.vx);
+    if (s.x > s.range[1]) s.vx = -Math.abs(s.vx);
+    if (intersects(p, s)) applyHit('Sabertooth tiger attack!');
+  }
+}
+
+function updateMammoths() {
+  const p = state.player;
+  for (const m of state.mammoths) {
+    const body = { x: m.x, y: groundY - 130, width: m.width, height: 70 };
+    const leftLeg = { x: m.x + 14, y: groundY - 60, width: 24, height: 60 };
+    const rightLeg = { x: m.x + m.width - 38, y: groundY - 60, width: 24, height: 60 };
+    if (intersects(p, body) || intersects(p, leftLeg) || intersects(p, rightLeg)) {
+      if (!p.ducking) {
+        applyHit('Mammoth stomp! Duck through the legs.');
+      }
+    }
+  }
+}
+
+const PTERODACTYL_LANES = [{ y: groundY - 80, height: 28 }];
+
+function getPterodactylHitbox(flyer) {
+  return { x: flyer.x + 8, y: flyer.y + 6, width: flyer.width - 16, height: flyer.height - 12 };
+}
+
+function getPlayerHitboxForAirHazards(player) {
+  const widthInset = player.ducking ? 8 : 6;
+  const topInset = player.ducking ? 8 : 4;
+  return {
+    x: player.x + widthInset,
+    y: player.y + topInset,
+    width: player.width - widthInset * 2,
+    height: player.height - topInset - 2
+  };
+}
+
+function updatePterodactyls(dt) {
+  if (state.score <= DIFFICULTY[gameConfig.difficulty].pteroUnlock) return;
   state.pteroSpawnTimer -= dt;
+
   if (state.pteroSpawnTimer <= 0) {
-    const altitude = groundY - (state.player.standingHeight - 24);
-    state.pterodactyls.push({
-      x: state.cameraX + canvas.width + 80,
-      y: altitude,
-      width: 54,
-      height: 26,
-      vx: -280
-    });
-    state.pteroSpawnTimer = 2.2;
+    const lane = PTERODACTYL_LANES[0];
+    const speedMul = DIFFICULTY[gameConfig.difficulty].hazardSpeed;
+    state.pterodactyls.push({ x: state.cameraX + canvas.width + 80, y: lane.y, width: 54, height: lane.height, vx: -280 * speedMul });
+    playSfx('ptero_spawn');
+    state.pteroSpawnTimer = DIFFICULTY[gameConfig.difficulty].pteroSpawn;
   }
 
   const p = state.player;
+  const playerHitbox = getPlayerHitboxForAirHazards(p);
   for (const flyer of state.pterodactyls) {
     flyer.x += flyer.vx * dt;
-    if (intersects(p, flyer)) {
-      applyHit('Pterodactyl collision. Duck next time!');
-    }
+    if (intersects(playerHitbox, getPterodactylHitbox(flyer))) applyHit('Pterodactyl collision. Duck next time!');
   }
   state.pterodactyls = state.pterodactyls.filter((f) => f.x + f.width > state.cameraX - 150);
 }
 
 function updateMeteors(dt) {
-  if (state.score <= 250) return;
-
+  if (state.score <= DIFFICULTY[gameConfig.difficulty].meteorUnlock) return;
   state.meteorSpawnTimer -= dt;
+
   if (state.meteorSpawnTimer <= 0) {
     const spawnX = state.cameraX + 80 + Math.random() * (canvas.width - 160);
-    state.meteors.push({ x: spawnX, y: -30, width: 24, height: 30, vy: 420 });
-    state.meteorSpawnTimer = 1.5;
+    state.meteors.push({ x: spawnX, y: -30, width: 24, height: 30, vy: 420 * DIFFICULTY[gameConfig.difficulty].hazardSpeed, landed: false });
+    playSfx('meteor_spawn');
+    state.meteorSpawnTimer = DIFFICULTY[gameConfig.difficulty].meteorSpawn;
   }
 
   const p = state.player;
   for (const m of state.meteors) {
     m.y += m.vy * dt;
+    if (!m.landed && m.y + m.height >= groundY) {
+      m.landed = true;
+      playSfx('meteor_land');
+    }
     if (intersects(p, m)) {
       applyHit('Meteor strike!');
       m.y = canvas.height + 100;
@@ -227,7 +655,10 @@ function updatePlayer(dt) {
   if (keys.has('ArrowLeft')) move -= 1;
   if (keys.has('ArrowRight')) move += 1;
 
+  const wasDucking = p.ducking;
   p.ducking = keys.has('ArrowDown') && p.onGround;
+  if (!wasDucking && p.ducking) playSfx('duck');
+
   const targetHeight = p.ducking ? p.duckHeight : p.standingHeight;
   if (targetHeight !== p.height) {
     p.y += p.height - targetHeight;
@@ -254,10 +685,8 @@ function updatePlayer(dt) {
     p.y = groundY - p.height;
     p.vy = 0;
     p.onGround = true;
-
-    if (isOverWater(p)) {
-      kill('SPLASH! Water is instant death.');
-    }
+    if (isOverWater(p)) kill('SPLASH! Water is instant death.');
+    if (isOverLava(p)) kill('LAVA! Instant death.');
   } else {
     p.onGround = false;
   }
@@ -265,17 +694,6 @@ function updatePlayer(dt) {
   state.cameraX = Math.max(0, Math.min(worldWidth - canvas.width, p.x - 240));
 }
 
-function drawDeathText() {
-  if (!state.dead) return;
-  ctx.fillStyle = 'rgba(0,0,0,0.55)';
-  ctx.fillRect(0, 0, canvas.width, canvas.height);
-  ctx.fillStyle = '#fff';
-  ctx.font = 'bold 42px Arial';
-  ctx.fillText('Game Over', 360, 220);
-  ctx.font = '24px Arial';
-  ctx.fillText(state.deadReason, 280, 270);
-}
-
 function tick(ts) {
   const dt = Math.min((ts - state.lastTs) / 1000, 0.05);
   state.lastTs = ts;
@@ -284,17 +702,25 @@ function tick(ts) {
     state.hitCooldown = Math.max(0, state.hitCooldown - dt);
     updatePlayer(dt);
     updateAnts(dt);
+    updateCactus();
+    updateMonkeys(dt);
+    updateSabertooths(dt);
+    updateMammoths();
     updatePterodactyls(dt);
     updateMeteors(dt);
+    updateFloatingTexts(dt);
   }
 
   ctx.clearRect(0, 0, canvas.width, canvas.height);
   drawBackground();
   drawAnts();
+  drawMonkeys();
+  drawSabertooths();
+  drawMammoths();
   drawPterodactyls();
   drawMeteors();
+  drawFloatingTexts();
   drawTRex(state.player);
-  drawDeathText();
 
   scoreEl.textContent = `Score: ${state.score}`;
   updateHeartsUI();

styles.css

@@ -25,7 +25,8 @@ body {
   border: 2px solid #1b3a47;
   background: #b5ecff;
 }
-#deathScreen {
+#deathScreen,
+#startScreen {
   position: fixed;
   inset: 0;
   background: rgba(0,0,0,0.65);
@@ -40,9 +41,37 @@ body {
   width: min(92vw, 460px);
 }
 .hidden { display: none !important; }
-button, input {
+button, input, select {
   font-size: 16px;
   padding: 8px 10px;
   margin-top: 8px;
+  width: 100%;
+}
+label {
+  display: block;
+  margin-top: 10px;
+  font-weight: 700;
+}
+.inline-option {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.inline-option input {
+  width: auto;
+  margin: 0;
+}
+.error {
+  color: #c62828;
+  min-height: 20px;
 }
 ol { padding-left: 22px; }
+
+/* removed unused play-again-row styles */
+
+.heart {
+  display: inline-block;
+  margin-right: 2px;
+}
+.heart-active { color: #f2c94c; }
+.heart-lost { color: #111; }