script.js

window.addEventListener('load', function () {
 // canvas setup
 const canvas = this.document.getElementById('canvas1');
 const ctx = canvas.getContext('2d');
 canvas.width = 1500;
 canvas.height = 500; 

 const game = new Game(canvas.width, canvas.height);
 let lastTime = 0;

 // animation loop
 function animate(timeStamp) {
 const deltaTime = timeStamp - lastTime;
 lastTime = timeStamp;
 ctx.clearRect(0, 0, canvas.width, canvas.height);
 game.draw(ctx);
 game.update(deltaTime);
 requestAnimationFrame(animate)
 }

 animate(0);
})