private void centerFlappyBird() {
		// passive player intro
		if(flappyBird.getPosition().x < -.2f && flapCount < 2) {
			flappyBird.setLinearVelocity(.25f, 0);
			flappyBird.setTransform(flappyBird.getPosition().x, .05f, 0);
		}
		// active player intro
		else if (flappyBird.getPosition().x < -.137f)
			flappyBird.setLinearVelocity(.25f, flappyBird.getLinearVelocity().y);		
	}