My first impression is, he's lucky. Then I thought, it's not level, then I wondered about the wall on the right, with what appears to be railings, and the trees behind that all seem level enough, and the couple themselves look fairly straight... Sometimes where land sweeps in towards the camera position it can suggest things aren't level. But I don't know. In colour the sky might rescue all that empty space a bit. All in all it's something of a phone 'snap', simply recording a happy moment, but little more than that. But keep trying!