If you look at the line of the corner closest to the righthand border of this frame, you see that it runs parallel to the border ... so that part is not tilted. And still there is this impression ... effect of the wide angle?
Further enhanced by the point of view - and further by the leaning chairs?
I guess that if I had composed this, I'd have included either a bit more foreground and less sky, or less foreground and some more sky ... can't quite tell... but it looks too centred the way it is, IMHO.