GameView() {
    AnimationTimer animationTimer = new AnimationTimer() {

        @Override
        public void handle(final long time) {
            updateGame()
        }
    };

    private void updateGame() {
        entitiesView.stream().forEach(entityView::update);
    }
}

EntityView() {

    EntityModel model;
    ImageView myImage;

    public EntityView(EntityModel model) {
        this.model = model;
        // creazione immagine e inserimento nella scena
        // etc..
    }

    public void update() {
        myImage.setX(model.getPosition().x);
        myImage.setY(model.getPosition().y);
    }
}