world.setManager(new PlayerManager());
world.setManager(new TagManager());
world.setManager(new GroupManager());
world.setSystem(new SoundSystem());
world.setSystem(new HealthSystem());
world.setSystem(new PhysicsSystem());
world.setSystem(new ExpirationSystem());
world.setSystem(new PlayerTankTowerSystem(container));
world.setSystem(new PlayerTankMovementSystem(container));