public void configureEntities() {
Entity entity;
this.entities.add(
GameObjectFactory.getInstance().createPlayer("/spritesheet_1_player.png", 1, 1, 40, 40));
entity = GameObjectFactory.getInstance().createEnemy("/spritesheet_1_enemy.png", 1, 1, 40, 40);
entity.setSpeed(2f);
this.entities.add(entity);
}