Game.js

function Game(){

}

Game.prototype.init = function(){

 this.gameWorld = new GameWorld();
}

Game.prototype.start = function(){

 PoolGame.init();

 PoolGame.mainLoop();

}

Game.prototype.mainLoop = function(){

 Canvas.clear();
 PoolGame.gameWorld.update();
 PoolGame.gameWorld.draw();
 Mouse.reset();

 requestAnimationFrame(PoolGame.mainLoop);

}

let PoolGame = new Game();