const canvas = document.getElementById('canvas'); const ctx = canvas.getContext('2d'); let playerX = canvas.width / 2; let playerY = canvas.height - 30; let playerWidth = 30; let playerHeight = 30; let playerSpeed = 5; let enemyRowCount = 4; let enemyColumnCount = 8; let enemyWidth = 30; let enemyHeight = 30; let enemyPadding = 10; let enemyOffsetTop = 30; let enemyOffsetLeft = 30; let enemies = []; for(let c=0; c e.x && bulletX < e.x+enemyWidth && bulletY > e.y && bulletY < e.y+enemyHeight) { e.status = 0; bulletFired = false; score++; if(score == enemyRowCount*enemyColumnCount) { alert("YOU WIN!"); document.location.reload(); } } } } } } function drawScore() { ctx.font = "16px Arial"; ctx.fillStyle = "#0095DD"; ctx.fillText("Score: "+score, 8, 20); } function movePlayer(direction) { if(direction == "left" && playerX > 0) { playerX -= playerSpeed; } else if(direction == "right" && playerX < canvas.width - playerWidth) { playerX += playerSpeed; } } function fireBullet() { if(!bulletFired) { bulletX = playerX + playerWidth / 2; bulletY = playerY; bulletFired = true; } } function moveBullet() { if(bulletFired) { bulletY -= bulletSpeed; if(bulletY < 0) { bulletFired = false; } } } function draw() { ctx.clearRect(0, 0, canvas.width, canvas.height); drawPlayer(); drawEnemies(); drawBullet(); collisionDetection(); drawScore(); moveBullet(); } document.addEventListener("keydown", keyDownHandler, false); document.addEventListener("keyup", keyUpHandler, false); let leftPressed = false; let rightPressed = false; function keyDownHandler(e) { if(e.keyCode == 37) { leftPressed = true; } else if(e.keyCode == 39) { rightPressed = true; } else if(e.keyCode == 32) { fireBullet(); } } function keyUpHandler(e) { if(e.keyCode == 37) { leftPressed = false; } else if(e.keyCode == 39) { rightPressed = false; } } function gameLoop() { if(leftPressed) { movePlayer("left"); } else if(rightPressed) { movePlayer("right"); } draw(); } setInterval(gameLoop, 10);

GPTgame

Sign up for free tokens!

Space invaders

GPTgame