FrogEdgeGame/index.html at master · jasondev68/FrogEdgeGame · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>FrogEdge</title>
    <script src="https://cdn.jsdelivr.net/npm/@farcade/game-sdk@latest/dist/index.min.js"></script>
    <link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap" rel="stylesheet">
    <style>
      body {
        margin: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        background-color: #4caf50;
        overflow: hidden;
        touch-action: none;
      }
      #game-container {
        width: 100%;
        max-width: 500px;
        height: 100%;
        max-height: 1000px;
        position: relative;
      }
      canvas {
        width: 100%;
        height: 100%;
        display: block;
        background-color: #87ceeb;
      }
      /* Font pixel cho hướng dẫn */
      #welcomeScreen .pixel-font {
        font-family: 'Press Start 2P', monospace;
        font-size: 0.6em;
        line-height: 1.5;
        max-width: 95vw;
      }
      @media (max-width: 400px) {
        #welcomeScreen .pixel-font {
          font-size: 0.38em;
        }
      }
      #startBtn.pixel-font {
        font-family: 'Press Start 2P', monospace;
        font-size: 1.1em;
      }
    </style>
  </head>
  <body>
    <div id="game-container">
      <canvas id="gameCanvas"></canvas>
    </div>
    <!-- Trang hướng dẫn -->
    <div id="welcomeScreen" style="
      position:fixed;top:0;left:0;width:100vw;height:100vh;
      background:rgba(0,0,0,0.7);color:#fff;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;">
      <div class="pixel-font" style="max-width:400px;text-align:center;font-size:1.3em;margin-bottom:40px;">
        <b>How to Play:</b><br>
        - Press <b>←</b> or <b>→</b> to move<br>
        - Press <b>Space</b> or <b>↑</b> to jump<br>
        - Long press key to jump higher<br>
        <div style="margin-top:16px;">
          <img src="/assets/logoedge.png" alt="Item" style="width:86px;height:86px;vertical-align:middle;">
          <span style="font-size:1em;vertical-align:middle;">Collect items to increase score and survival</span>
        </div>
        - Avoid obstacles and don't fall down!<br>
        <span style="font-size:1em;vertical-align:middle;">Created by jason</span>
      </div>
      <button id="startBtn" class="pixel-font" style="font-size:2em;padding:20px 60px;cursor:pointer;">Start</button>
    </div>
    <script>
      const canvas = document.getElementById("gameCanvas");
      const ctx = canvas.getContext("2d");
      const gameContainer = document.getElementById("game-container");

      // Responsive canvas sizing
      function resizeCanvas() {
        const maxWidth = 500;
        const maxHeight = 1000;
        const aspectRatio = maxWidth / maxHeight;
        let width = Math.min(window.innerWidth, maxWidth);
        let height = width / aspectRatio;
        if (height > window.innerHeight || height > maxHeight) {
          height = Math.min(window.innerHeight, maxHeight);
          width = height * aspectRatio;
        }
        canvas.width = width;
        canvas.height = height;
        canvas.style.width = `${width}px`;
        canvas.style.height = `${height}px`;
        gameContainer.style.width = `${width}px`;
        gameContainer.style.height = `${height}px`;
      }
      resizeCanvas();
      window.addEventListener("resize", resizeCanvas);

      // Game state
      let gameState = {
        score: 0,
        highScore: localStorage.getItem("highScore") || 0,
        gameOver: false,
        cameraY: 0,
        difficulty: 1,
        lastPlatformY: 0,
        isMuted: false, // Placeholder for audio mute state
        hasStarted: false, // Đã nhảy lần đầu chưa
        hasLanded: false, // Đã tiếp đất sau nhảy đầu chưa
        timeLeft: 30, // Thời gian còn lại (giây)
      };

      // Frog
      const frog = {
        x: canvas.width / 2,
        y: canvas.height - 50,
        width: 40,
        height: 40,
        vx: 0,
        vy: 0,
        jumpPower: 0,
        maxJumpPower: 20,
        isJumping: false,
        onGround: true,
      };
      const maxMoveSpeed = 6;
      const moveAccel = 1.2;
      const friction = 0.7;

      // Platforms, obstacles, collectibles, particles
      let platforms = [];
      let obstacles = [];
      let collectibles = [];
      let particles = [];

      // Input handling
      let moveDirection = 0;
      let isHolding = false;
      let holdStartTime = 0;
      const maxJump = 28;
      const minJump = 13;
      const maxHold = 1; // giữ tối đa 1 giây để đạt lực nhảy tối đa

      // Load frog sprites
      const frogLeftSprite = new Image();
      frogLeftSprite.src = '/assets/pepeLeft.png';
      const frogRightSprite = new Image();
      frogRightSprite.src = '/assets/pepeRight.png';
      const frogIdleSprite = new Image();
      frogIdleSprite.src = '/assets/pepeStand.png';
      const frogFrameCount = 6;
      let frogFrame = 0;
      let frogFrameTimer = 0;
      const frogFrameIntervalIdle = 0.07; // Đứng yên: rất nhanh
      const frogFrameIntervalMove = 0.12; // Di chuyển: bình thường
      let idleFrameWidth = 100, idleFrameHeight = 100;
      let leftFrameWidth = 100, leftFrameHeight = 100;
      let rightFrameWidth = 100, rightFrameHeight = 100;
      let frogState = 'idle'; // 'idle', 'left', 'right'
      let prevFrogState = 'idle';
      const idleFrameCount = 3; // chỉ dùng 3 frame đầu cho idle
      function updateFrogFrameSize(sprite) {
        if (!frogSizeInitialized) {
          frogFrameWidth = sprite.width / frogFrameCount;
          frogFrameHeight = sprite.height;
          frog.width = frogFrameWidth;
          frog.height = frogFrameHeight;
          frogSizeInitialized = true;
        }
      }
      frogRightSprite.onload = function() {
        rightFrameWidth = frogRightSprite.width / frogFrameCount;
        rightFrameHeight = frogRightSprite.height;
      };
      frogLeftSprite.onload = function() {
        leftFrameWidth = frogLeftSprite.width / frogFrameCount;
        leftFrameHeight = frogLeftSprite.height;
      };
      frogIdleSprite.onload = function() {
        idleFrameWidth = frogIdleSprite.width / frogFrameCount;
        idleFrameHeight = frogIdleSprite.height;
      };

      // Thêm load ảnh item vàng
      const itemImg = new Image();
      itemImg.src = '/assets/logoedge.png';

      // Thêm load ảnh bigbot
      const bigbotImg = new Image();
      bigbotImg.src = '/assets/bigbot.png';

      // Keyboard controls
      document.addEventListener("keydown", (e) => {
        if (!gameState.gameOver) {
          if (e.key === "ArrowLeft" || e.key === "a") moveDirection = -1;
          if (e.key === "ArrowRight" || e.key === "d") moveDirection = 1;
          if ((e.key === " " || e.key === "ArrowUp") && frog.onGround && !isHolding) {
            isHolding = true;
            holdStartTime = Date.now();
          }
        } else if (e.key === "Enter") {
          resetGame();
        }
      });

      document.addEventListener("keyup", (e) => {
        if (e.key === "ArrowLeft" || e.key === "a" || e.key === "ArrowRight" || e.key === "d") {
          moveDirection = 0;
        }
        if ((e.key === " " || e.key === "ArrowUp") && isHolding) {
          if (frog.onGround) {
            const holdTime = (Date.now() - holdStartTime) / 1000; // không giới hạn
            const jumpPower = minJump + (maxJump - minJump) * holdTime;
            frog.vy = -jumpPower;
            frog.isJumping = true;
            frog.onGround = false;
            if (!gameState.hasStarted) gameState.hasStarted = true;
            if (window.FarcadeSDK) {
              window.FarcadeSDK.singlePlayer.actions.hapticFeedback();
            }
          }
          isHolding = false;
        }
      });

      // Touch controls
      canvas.addEventListener("touchstart", (e) => {
        e.preventDefault();
        const touchX = e.touches[0].clientX - canvas.getBoundingClientRect().left;
        if (!gameState.gameOver) {
          if (touchX < canvas.width / 3) {
            moveDirection = -1; // Move left
          } else if (touchX > (canvas.width * 2) / 3) {
            moveDirection = 1; // Move right
          } else if (frog.onGround && !isHolding) {
            isHolding = true;
            holdStartTime = Date.now();
          }
        } else {
          resetGame();
        }
      });
      canvas.addEventListener("touchend", (e) => {
        e.preventDefault();
        if (isHolding && frog.onGround) {
          const holdTime = (Date.now() - holdStartTime) / 1000; // không giới hạn
          const jumpPower = minJump + (maxJump - minJump) * holdTime;
          frog.vy = -jumpPower;
          frog.isJumping = true;
          frog.onGround = false;
          if (!gameState.hasStarted) gameState.hasStarted = true;
          if (window.FarcadeSDK) {
            window.FarcadeSDK.singlePlayer.actions.hapticFeedback();
          }
        }
        isHolding = false;
        moveDirection = 0;
      });

      // Platform generation (platform rộng hơn, nhiều chướng ngại vật hơn)
      function generatePlatform(y) {
        const minWidth = 140;
        const maxWidth = 180;
        const width = minWidth + Math.random() * (maxWidth - minWidth);
        // Đảm bảo bậc không random quá sát mép
        const margin = 20;
        const x = margin + Math.random() * (canvas.width - width - 2 * margin);
        // 70% bậc xanh, 30% bậc xám
        const type = Math.random() < 0.7 ? "normal" : "falling";
        platforms.push({
          x: x,
          y: y,
          width: width,
          height: 20,
          fade: 1,
          landed: false,
          type: type,
          fallTimer: type === "falling" ? null : undefined,
        });
        // Chỉ sinh collectibles là fly (item/logoedge)
        collectibles.push({
          x: x + width / 2 - 20,
          y: y - 80,
          width: 40,
          height: 40,
          type: "fly",
        });
        // Chỉ sinh nước (water) đi ngang với xác suất thấp
        if (Math.random() < 0.02 * gameState.difficulty) {
          obstacles.push({
            x: 0,
            y: y + 30,
            width: canvas.width,
            height: 50,
            type: "water",
            speed: 2 + gameState.difficulty * 1.2,
          });
        }
      }

      // Generate rushing water
      function generateWater(y) {
        obstacles.push({
          x: 0,
          y: y,
          width: canvas.width,
          height: 50,
          type: "water",
          speed: 2 + gameState.difficulty * 0.5,
        });
      }

      // Initialize platforms
      function initPlatforms() {
        platforms = [];
        for (let y = canvas.height - 50; y > -canvas.height; y -= 100) {
          generatePlatform(y);
        }
        gameState.lastPlatformY = -canvas.height;
      }

      // Particle effects
      function createSplash(x, y) {
        for (let i = 0; i < 10; i++) {
          particles.push({
            x: x,
            y: y,
            vx: (Math.random() - 0.5) * 5,
            vy: (Math.random() - 0.5) * 5,
            size: 5 + Math.random() * 5,
            life: 1,
          });
        }
        // Haptic feedback on splash
        if (window.FarcadeSDK) {
          window.FarcadeSDK.singlePlayer.actions.hapticFeedback();
        }
      }

      // Helper: lấy chiều rộng frame theo trạng thái
      function getCurrentFrogFrameWidth() {
        if (frogState === 'idle') return idleFrameWidth;
        if (frogState === 'left') return leftFrameWidth;
        if (frogState === 'right') return rightFrameWidth;
        return idleFrameWidth;
      }

      // Helper: lấy chiều cao frame theo trạng thái
      function getCurrentFrogFrameHeight() {
        if (frogState === 'idle') return idleFrameHeight;
        if (frogState === 'left') return leftFrameHeight;
        if (frogState === 'right') return rightFrameHeight;
        return idleFrameHeight;
      }

      // Update game
      function update() {
        if (gameState.gameOver) return;

        // Tăng tốc độ di chuyển trái/phải và gravity theo difficulty
        const moveSpeed = 5 + (gameState.difficulty - 1) * 2; // tăng dần
        const gravity = 0.5 + (gameState.difficulty - 1) * 0.3; // tăng dần

        if (!gameState.hasStarted) {
          // Chưa nhảy: chỉ cho phép di chuyển trái/phải trên platform đầu tiên
          if (platforms.length > 0) {
            const firstPlatform = platforms.reduce((max, p) => (p.y > max.y ? p : max), platforms[0]);
            if (moveDirection !== 0) {
              frog.vx += moveDirection * moveAccel;
              if (frog.vx > maxMoveSpeed) frog.vx = maxMoveSpeed;
              if (frog.vx < -maxMoveSpeed) frog.vx = -maxMoveSpeed;
            } else {
              frog.vx *= friction;
              if (Math.abs(frog.vx) < 0.1) frog.vx = 0;
            }
            frog.x += frog.vx;
            // Giữ ếch trong platform đầu tiên
            if (frog.x < firstPlatform.x) frog.x = firstPlatform.x;
            if (frog.x + frog.width > firstPlatform.x + firstPlatform.width)
              frog.x = firstPlatform.x + firstPlatform.width - frog.width;
            frog.y = firstPlatform.y - getCurrentFrogFrameHeight();
            frog.vy = 0;
          }
          frogState = 'idle';
          return; // Không update gì thêm khi chưa nhảy
        }

        // Đã nhảy: update như bình thường
        // Update frog (di chuyển ngang mượt)
        if (moveDirection !== 0) {
          frog.vx += moveDirection * moveAccel;
          if (frog.vx > maxMoveSpeed) frog.vx = maxMoveSpeed;
          if (frog.vx < -maxMoveSpeed) frog.vx = -maxMoveSpeed;
        } else {
          // Áp dụng ma sát khi không nhấn phím
          frog.vx *= friction;
          if (Math.abs(frog.vx) < 0.1) frog.vx = 0;
        }
        frog.x += frog.vx;
        frog.y += frog.vy;
        frog.vy += gravity; // Gravity tăng dần

        // Keep frog in bounds
        if (frog.x < 0) frog.x = 0;
        if (frog.x + frog.width > canvas.width) frog.x = canvas.width - frog.width;

        // Camera follow
        if (frog.y < canvas.height / 3) {
          gameState.cameraY = canvas.height / 3 - frog.y;
          gameState.score = Math.max(gameState.score, Math.floor(-frog.y / 10));
          gameState.difficulty = 1 + gameState.score / 500;
        }

        // Check collisions
        let onPlatform = false;
        let currentPlatform = null;
        platforms.forEach((p) => {
          const hitboxPadding = getCurrentFrogFrameWidth() * 0.15; // 15% mỗi bên
          const hitboxLeft = frog.x + hitboxPadding;
          const hitboxRight = frog.x + getCurrentFrogFrameWidth() - hitboxPadding;
          if (
            frog.vy > 0 &&
            hitboxRight > p.x &&
            hitboxLeft < p.x + p.width &&
            Math.abs(frog.y + getCurrentFrogFrameHeight() - p.y) < 6
          ) {
            frog.y = p.y - getCurrentFrogFrameHeight();
            frog.vy = 0;
            frog.onGround = true;
            frog.isJumping = false;
            onPlatform = true;
            currentPlatform = p;
            // Nếu là bậc xám thì bắt đầu đếm ngược 2s
            if (p.type === "falling" && p.fallTimer == null) {
              p.fallTimer = 2;
            }
            // Đánh dấu đã tiếp đất sau nhảy đầu
            if (gameState.hasStarted) gameState.hasLanded = true;
            // Haptic feedback on landing
            if (window.FarcadeSDK) {
              window.FarcadeSDK.singlePlayer.actions.hapticFeedback();
            }
          }
        });
        frog.onGround = onPlatform;

        // Check obstacles
        obstacles.forEach((o) => {
          if (
            frog.x + frog.width > o.x &&
            frog.x < o.x + o.width &&
            frog.y + frog.height > o.y &&
            frog.y < o.y + o.height
          ) {
            if ((o.type === "water" || o.type === "crocodile") && gameState.hasStarted && gameState.hasLanded) {
              createSplash(frog.x + frog.width / 2, frog.y + frog.height);
              gameOver();
            }
          }
          if (o.type === "water") {
            o.x += o.speed;
            if (o.x > canvas.width) o.x = -o.width;
          }
        });

        // Check collectibles
        collectibles = collectibles.filter((c) => {
          if (
            frog.x + frog.width > c.x &&
            frog.x < c.x + c.width &&
            frog.y + frog.height > c.y &&
            frog.y < c.y + c.height
          ) {
            if (c.type === "fly") {
              gameState.score += 50;
              gameState.timeLeft += 2; // Cộng thêm 2 giây
              // Haptic feedback on collecting fly
              if (window.FarcadeSDK) {
                window.FarcadeSDK.singlePlayer.actions.hapticFeedback();
              }
              return false;
            }
          }
          return true;
        });

        // Platform fading
        platforms = platforms.filter((p) => p.type !== "falling" || p.fade > 0);

        // Giảm fallTimer cho các bậc xám đang chờ biến mất
        const delta = 1 / 60; // giả định 60fps, hoặc lấy từ gameLoop nếu có
        platforms.forEach((p) => {
          if (p.type === "falling" && p.fallTimer != null) {
            p.fallTimer -= delta;
          }
        });
        // Xóa bậc xám khi fallTimer <= 0
        platforms = platforms.filter((p) => p.type !== "falling" || p.fallTimer == null || p.fallTimer > 0);

        // Generate new platforms vô hạn
        while (gameState.lastPlatformY > frog.y - 2 * canvas.height) {
          generatePlatform(gameState.lastPlatformY - 70);
          gameState.lastPlatformY -= 70;
        }

        // Update particles
        particles.forEach((p) => {
          p.x += p.vx;
          p.y += p.vy;
          p.life -= 0.05;
          p.size *= 0.95;
        });
        particles = particles.filter((p) => p.life > 0);

        // Check for falling
        if (frog.y > canvas.height + gameState.cameraY && gameState.hasStarted && gameState.hasLanded) {
          createSplash(frog.x + frog.width / 2, canvas.height);
          gameOver();
        }

        // Reset frame khi đổi trạng thái
        if (frogState !== prevFrogState) {
          frogFrame = 0;
          frogFrameTimer = 0;
        }
        prevFrogState = frogState;
        // Cập nhật hoạt ảnh
        let currentFrameInterval = (frogState === 'idle') ? frogFrameIntervalIdle : frogFrameIntervalMove;
        if (frog.onGround) {
          frogFrameTimer += 1/60;
          if (frogFrameTimer > currentFrameInterval) {
            frogFrame = (frogFrame + 1) % frogFrameCount;
            frogFrameTimer = 0;
          }
        } else {
          frogFrame = 0;
        }

        // Xác định trạng thái frogState
        if (!gameState.hasStarted) {
          frogState = 'idle';
        } else if (moveDirection === -1 && frog.onGround) {
          frogState = 'left';
        } else if (moveDirection === 1 && frog.onGround) {
          frogState = 'right';
        } else if (moveDirection === 0 && frog.onGround) {
          frogState = 'idle';
        }
      }

      // Lose game (game over)
      function gameOver() {
        gameState.gameOver = true;
        if (gameState.score > gameState.highScore) {
          gameState.highScore = gameState.score;
          localStorage.setItem("highScore", gameState.highScore);
        }
        // Call Farcade gameOver with score
        if (window.FarcadeSDK) {
          window.FarcadeSDK.singlePlayer.actions.gameOver({ score: gameState.score });
        }
      }

      // Reset game
      function resetGame() {
        gameState.score = 0;
        gameState.gameOver = false;
        gameState.cameraY = 0;
        gameState.difficulty = 1;
        gameState.lastPlatformY = canvas.height - 50;
        gameState.hasStarted = false;
        gameState.hasLanded = false;
        gameState.timeLeft = 30;
        platforms = [];
        obstacles = [];
        collectibles = [];
        particles = [];
        initPlatforms();
        // Đặt ếch lên đúng platform đầu tiên
        if (platforms.length > 0) {
          const firstPlatform = platforms.reduce((max, p) => (p.y > max.y ? p : max), platforms[0]);
          frog.x = firstPlatform.x + firstPlatform.width / 2 - idleFrameWidth / 2;
          frog.y = firstPlatform.y - idleFrameHeight;
        } else {
          frog.x = canvas.width / 2;
          frog.y = canvas.height - idleFrameHeight;
        }
        frog.vy = 0;
        frog.onGround = true;
        // Call ready again after reset
        if (window.FarcadeSDK) {
          window.FarcadeSDK.singlePlayer.actions.ready();
        }
      }

      // Farcade SDK event handlers
      if (window.FarcadeSDK) {
        // Handle play again
        window.FarcadeSDK.on("play_again", () => {
          resetGame();
        });

        // Handle mute/unmute
        window.FarcadeSDK.on("toggle_mute", (data) => {
          gameState.isMuted = data.isMuted;
          // Placeholder: Update audio state when audio is added
          console.log(`Audio muted: ${gameState.isMuted}`);
        });
      }

      // Draw game
      function draw() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);

        // Apply camera
        ctx.save();
        ctx.translate(0, gameState.cameraY);

        // Draw platforms
        platforms.forEach((p) => {
          if (p.type === "falling") {
            ctx.fillStyle = `rgba(120, 120, 120, 1)`;
          } else {
            ctx.fillStyle = `rgba(34, 139, 34, 1)`;
          }
          ctx.fillRect(p.x, p.y, p.width, p.height);
        });

        // Draw obstacles
        obstacles.forEach((o) => {
          if (o.type === "crocodile") {
            ctx.fillStyle = "#228B22";
            ctx.fillRect(o.x, o.y, o.width, o.height);
          } else if (o.type === "water") {
            // Vẽ hình bigbot thay cho hình chữ nhật màu xanh
            ctx.drawImage(bigbotImg, o.x, o.y, o.width, o.height);
          }
        });

        // Draw collectibles
        collectibles.forEach((c) => {
          if (c.type === "fly") {
            // Vẽ hình ảnh item/logoedge với kích thước lớn hơn
            ctx.drawImage(itemImg, c.x, c.y, c.width, c.height);
          }
        });

        // Draw frog
        if (frogState === 'idle') {
          ctx.drawImage(
            frogIdleSprite,
            frogFrame * idleFrameWidth, 0, idleFrameWidth, idleFrameHeight,
            frog.x, frog.y, idleFrameWidth, idleFrameHeight
          );
        } else if (frogState === 'left') {
          ctx.drawImage(
            frogLeftSprite,
            frogFrame * leftFrameWidth, 0, leftFrameWidth, leftFrameHeight,
            frog.x, frog.y, leftFrameWidth, leftFrameHeight
          );
        } else if (frogState === 'right') {
          ctx.drawImage(
            frogRightSprite,
            frogFrame * rightFrameWidth, 0, rightFrameWidth, rightFrameHeight,
            frog.x, frog.y, rightFrameWidth, rightFrameHeight
          );
        }

        // Draw particles
        particles.forEach((p) => {
          ctx.fillStyle = `rgba(0, 105, 148, ${p.life})`;
          ctx.beginPath();
          ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
          ctx.fill();
        });

        ctx.restore();

        // Draw HUD
        ctx.save();
        ctx.font = "12px 'Press Start 2P', monospace";
        ctx.fillStyle = "#000";
        ctx.textAlign = "left";
        ctx.fillText(`Score: ${gameState.score}`, 10, 30);
        ctx.fillText(`High: ${gameState.highScore}`, 10, 60);
        ctx.textAlign = "right";
        ctx.fillText(`Time: ${Math.ceil(gameState.timeLeft)}s`, canvas.width - 10, 30);
        ctx.restore();

        // Game over screen
        if (gameState.gameOver) {
          ctx.fillStyle = "rgba(0, 0, 0, 0.7)";
          ctx.fillRect(0, 0, canvas.width, canvas.height);
          ctx.fillStyle = "#FFF";
          ctx.font = "40px Arial";
          ctx.textAlign = "center";
          ctx.fillText("Game Over", canvas.width / 2, canvas.height / 2 - 50);
          ctx.font = "30px Arial";
          ctx.fillText(`Score: ${gameState.score}`, canvas.width / 2, canvas.height / 2);
          ctx.fillText(`High Score: ${gameState.highScore}`, canvas.width / 2, canvas.height / 2 + 50);
          ctx.font = "20px Arial";
          ctx.fillText("Tap or Press Enter to Restart", canvas.width / 2, canvas.height / 2 + 100);
          ctx.textAlign = "left";
        }

        // Trang hướng dẫn và nút Start
        const welcomeScreen = document.getElementById('welcomeScreen');
        if (!gameState.hasStarted) {
          welcomeScreen.style.display = 'flex';
        } else {
          welcomeScreen.style.display = 'none';
        }
      }

      // Game loop
      let lastTimestamp = null;
      function gameLoop(timestamp) {
        if (!lastTimestamp) lastTimestamp = timestamp;
        const delta = (timestamp - lastTimestamp) / 1000; // giây
        lastTimestamp = timestamp;
        if (!gameState.gameOver && gameState.hasStarted) {
          gameState.timeLeft -= delta;
          if (gameState.timeLeft <= 0) {
            gameState.timeLeft = 0;
            gameOver();
          }
        }
        update();
        draw();
        requestAnimationFrame(gameLoop);
      }

      // Initialize and start
      initPlatforms();
      // Call Farcade ready when game is loaded
      if (window.FarcadeSDK) {
        window.FarcadeSDK.singlePlayer.actions.ready();
      }

      // Trang hướng dẫn và nút Start
      const welcomeScreen = document.getElementById('welcomeScreen');
      const startBtn = document.getElementById('startBtn');
      startBtn.onclick = function() {
        gameState.hasStarted = true;
        welcomeScreen.style.display = 'none';
      };

      gameLoop();
    </script>
  </body>
</html>