text: let backgroundManager = new BackgroundManager(200, "black", "background");
  let gameManager = new GameManager("playArea");
  let interfaceManager = new InterfaceManager(gameManager, "userInterface");
  
  function mainLoop() {
    backgroundManager.update();
    if(gameManager.playing) {
      gameManager.update();
      interfaceManager.update();
    } else {
      gameManager.clearScreen();
      interfaceManager.clearInterface();
      interfaceManager.gameOver();
    }
    requestAnimationFrame(mainLoop);
  }
  requestAnimationFrame(mainLoop);
  