public void update(GameContainer container, StateBasedGame game, int delta) {
	float mouseX = container.getInput().getMouseX();
	float mouseY = container.getInput().getMouseY();
	float xDistance = mouseX - position.x;
	float yDistance = mouseY - position.y;
	double angle = Math.toDegrees(Math.atan2(yDistance, xDistance));
	gun.setRotation((float) angle);
}