code:

// Define the maze
var maze = [
    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
    [1, 0, 0, 0, 1, 0, 0, 0, 0, 1],
    [1, 0, 1, 0, 1, 0, 1, 1, 0, 1],
    [1, 0, 1, 0, 0, 0, 0, 1, 0, 1],
    [1, 0, 1, 0, 1, 1, 0, 1, 0, 1],
    [0, 0, 0, 0, 0, 1, 0, 1, 0, 0],
    [1, 1, 1, 1, 1, 1, 0, 1, 0, 1],
    [1, 0, 0, 0, 0, 0, 0, 0, 0, 1],
    [1, 0, 1, 1, 1, 0, 1, 1, 0, 1],
    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
  ];
  
  // Get the current page's body
  var body = document.querySelector('body');
  
  // Create a new canvas element and set its attributes
  var canvas = document.createElement('canvas');
  canvas.id = 'canvas';
  canvas.width = maze[0].length * 40;
  canvas.height = maze.length * 40;
  
  
  // Add the canvas to the body
  body.innerHTML = '';
  body.appendChild(canvas);
  
  // Get the canvas context
  var ctx = canvas.getContext('2d');
  
  // Define the Pacman object
  var pacman = {
    x: 50,
    y: 50,
    startX: 50,
    startY: 50,
    radius: 25,
    speed: 5,
    color: 'yellow',
    directionX: 1,
    directionY: 0,
    score: 0,
    draw: function() {
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.radius, 0, 2*Math.PI);
      ctx.fillStyle = this.color;
      ctx.fill();
    },
    move: function() {
      // Move the Pacman
      var nextX = this.x + this.speed * this.directionX;
      var nextY = this.y + this.speed * this.directionY;
      if (this.checkCollision(nextX, nextY)) {
        return;
      }
      this.x = nextX;
      this.y = nextY;
      if (this.x > canvas.width) {
        this.x = 0;
      } else if (this.x < 0) {
        this.x = canvas.width;
      }
      if (this.y > canvas.height) {
        this.y = 0;
      } else if (this.y < 0) {
        this.y = canvas.height;
      }
    },
    checkCollision: function(nextX, nextY) {
      // Check for collision with walls
      var mazeX = Math.floor(nextX / 40);
      var mazeY = Math.floor(nextY / 40);
      if (maze[mazeY][mazeX] === 1) {
        return true;
      }
      // Check for collision with power pellets
      for (var i = 0; i < powerPellets.length; i++) {
        var pellet = powerPellets[i];
        if (pellet !== undefined && nextX > pellet.x - this.radius && nextX < pellet.x + this.radius && nextY > pellet.y - this.radius && nextY < pellet.y + this.radius) {
          // Pacman collided with a power pellet
          powerPellets[i] = undefined; // Remove the power pellet from the array
          this.score += 10;
        }
      }
      return false;
    }
  };
  
  // Define the Ghost object
  var ghost = {
    x: 150,
    y: 150,
    startX: 150,
    startY: 150,
    radius: 20,
    speed: 3,
    color: 'red',
    directionX: 1,
    directionY: 0,
    draw: function() {
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.radius, 0, 2*Math.PI);
      ctx.fillStyle = this.color;
      ctx.fill();
    },
    move: function() {
      // Move the ghost in a random direction
      if (this.checkCollision(this.x + this.speed * this.directionX, this.y + this.speed * this.directionY)) {
        this.directionX = Math.floor(Math.random() * 3) - 1;
        this.directionY = Math.floor(Math.random() * 3) - 1;
        while(this.directionX == 0 && this.directionY == 0) {
            this.directionX = Math.floor(Math.random() * 3) - 1;
            this.directionY = Math.floor(Math.random() * 3) - 1;
        }
      }
      var nextX = this.x + this.speed * this.directionX;
      var nextY = this.y + this.speed * this.directionY;
      if (this.checkCollision(nextX, nextY)) {
        return;
      }
      this.x = nextX;
      this.y = nextY;
      if (this.x > canvas.width) {
        this.x = 0;
      } else if (this.x < 0) {
        this.x = canvas.width;
      }
      if (this.y > canvas.height) {
        this.y = 0;
      } else if (this.y < 0) {
        this.y = canvas.height;
      }
    },
    checkCollision: function(nextX, nextY) {
      // Check for collision with walls
      var mazeX = Math.floor(nextX / 40);
      var mazeY = Math.floor(nextY / 40);
      if (maze[mazeY][mazeX] === 1) {
        return true;
      }
      // Check for collision with Pacman
      var distance = Math.sqrt(Math.pow(nextX - pacman.x, 2) + Math.pow(nextY - pacman.y, 2));
      if (distance < this.radius + pacman.radius) {
        pacman.x = pacman.startX;
        pacman.y = pacman.startY;
        ghost.x = ghost.startX;
        ghost.y = ghost.startY;
        powerPellets = [];
        for (var row = 0; row < maze.length; row++) {
            for (var col = 0; col < maze[row].length; col++) {
              // Check if the space is empty
              if (maze[row][col] === 0) {
                // Add a power pellet to the array
                powerPellets.push({x: col * 40 + 20, y: row * 40 + 20});
              }
            }
          }
        return false;
      }
      return false;
    }
  };
  
  
  // Draw the maze
  // Update the drawMaze function to draw the ghost
  function drawMaze() {
    // Loop through each row and column of the maze
    for (var row = 0; row < maze.length; row++) {
      for (var col = 0; col < maze[row].length; col++) {
        // Determine the color of the square based on the value in the maze array
        var color = maze[row][col] === 1 ? 'blue' : (maze[row][col] === 2 ? 'red' : 'black');
        // Draw the square
        ctx.fillStyle = color;
        ctx.fillRect(col * 40, row * 40, 40, 40);
      }
    }
    // Draw the ghost
    ghost.draw();
  }
  // Call the drawMaze function to draw the maze
  drawMaze();
  
  
  // Define the power pellet object
  var powerPellet = {
    radius: 5,
    color: 'white',
    draw: function(x, y) {
      ctx.beginPath();
      ctx.arc(x, y, this.radius, 0, 2*Math.PI);
      ctx.fillStyle = this.color;
      ctx.fill();
    }
  };
  
  // Create an array to store the position of all power pellets
  var powerPellets = [];
  
  // Loop through each row and column of the maze
  for (var row = 0; row < maze.length; row++) {
    for (var col = 0; col < maze[row].length; col++) {
      // Check if the space is empty
      if (maze[row][col] === 0) {
        // Add a power pellet to the array
        powerPellets.push({x: col * 40 + 20, y: row * 40 + 20});
      }
    }
  }
  
  // Draw all power pellets
  function drawPowerPellets() {
    for (var i = 0; i < powerPellets.length; i++) {
      var pellet = powerPellets[i];
      if (pellet !== undefined) {
        powerPellet.draw(pellet.x, pellet.y);
      }
    }
  }
  
  // Call the drawPowerPellets function to draw the power pellets
  drawPowerPellets();
  
  // Add an event listener to listen for arrow key presses
  document.addEventListener('keydown', function(event) {
    if (event.keyCode === 37) {
      // Left arrow key pressed
      pacman.directionX = -1;
      pacman.directionY = 0;
    } else if (event.keyCode === 38) {
      // Up arrow key pressed
      pacman.directionX = 0;
      pacman.directionY = -1;
    } else if (event.keyCode === 39) {
      // Right arrow key pressed
      pacman.directionX = 1;
      pacman.directionY = 0;
    } else if (event.keyCode === 40) {
      // Down arrow key pressed
      pacman.directionX = 0;
      pacman.directionY = 1;
    }
  });
  
  // Define the game loop
  function gameLoop() {
    // Clear the canvas
    ctx.clearRect(0, 0, canvas.width, canvas.height);
  
    // Move the ghost
    ghost.move();
    // Draw the maze
    drawMaze();
  
    // Move and draw the Pacman
    pacman.move();
    pacman.draw();
    drawPowerPellets();
  
    // Call the game loop again
    requestAnimationFrame(gameLoop);
  }
  
  // Start the game loop
  requestAnimationFrame(gameLoop);