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script.js
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script.js
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// Game variables
let paddleX = 200;
let paddleY = 450;
let ballX;
let ballY;
let ballXSpeed = 1;
let ballYSpeed = 1;
let score = 0;
let highestScore = 0;
let gameOver = false;
let restartButton;
let timer;
let random;
// Initialize the game
function initGame() {
// Get the canvas element and create a 2D drawing context
const canvas = document.getElementById("gameCanvas");
const context = canvas.getContext("2d");
canvas.width = 500;
canvas.height = 500;
// Set up the canvas and game objects
random = new Math.seedrandom();
ballX = random() * (canvas.width - 20);
ballY = random() * (canvas.height - 20);
// Create a restart button and hide it initially
restartButton = document.createElement("button");
restartButton.innerHTML = "Restart";
restartButton.style.position = "absolute";
restartButton.style.left = "200px";
restartButton.style.top = "225px";
restartButton.style.width = "100px";
restartButton.style.height = "50px";
restartButton.style.display = "none";
restartButton.addEventListener("click", restartGame);
document.body.appendChild(restartButton);
// Start the game loop
timer = setInterval(updateGame, 10);
// Handle key press events
document.addEventListener("keydown", function(event) {
if (event.keyCode === 37) {
// Left arrow key
paddleX -= 10;
} else if (event.keyCode === 39) {
// Right arrow key
paddleX += 10;
}
if (paddleX < 0) {
paddleX = 0;
} else if (paddleX > canvas.width - 80) {
paddleX = canvas.width - 80;
}
});
// Update the game state
function updateGame() {
moveBall();
// Clear the canvas
context.clearRect(0, 0, canvas.width, canvas.height);
// Draw the ball
context.fillStyle = "blue";
context.beginPath();
context.arc(ballX, ballY, 10, 0, 2 * Math.PI);
context.fill();
// Draw the paddle
context.fillStyle = "red";
context.fillRect(paddleX, paddleY, 80, 10);
// Draw the score
context.fillStyle = "black";
context.font = "16px Arial";
context.fillText("Score: " + score, 10, 20);
context.fillText("Highest Score: " + highestScore, 10, 40);
// Check if the game is over
if (gameOver) {
// Stop the game loop
clearInterval(timer);
// Display game over message and show the restart button
context.fillStyle = "black";
context.font = "20px Arial";
context.fillText("Game Over", 200, 200);
restartButton.style.display = "block";
}
}
// Move the ball and handle collisions
function moveBall() {
ballX += ballXSpeed;
ballY += ballYSpeed;
if (ballX <= 0 || ballX >= canvas.width - 20) {
ballXSpeed = -ballXSpeed;
}
if (ballY <= 0 || ballY >= canvas.height - 20) {
ballYSpeed = -ballYSpeed;
}
if (
ballX < paddleX + 80 &&
ballX + 20 > paddleX &&
ballY < paddleY + 10 &&
ballY + 20 > paddleY
) {
ballYSpeed = -ballYSpeed;
score++;
} else if (ballY >= canvas.height - 20) {
gameOver = true;
}
}
// Restart the game
function restartGame() {
gameOver = false;
restartButton.style.display = "none";
ballX = random() * (canvas.width - 20);
ballY = random() * (canvas.height - 20);
ballXSpeed = 1;
ballYSpeed = 1;
score = 0;
timer = setInterval(updateGame, 10);
}
}
// Start the game
window.onload = function() {
initGame();
};