Sorry, but i'm not quite understanding how this is a dream about another dimension?

I've had 2 dimensional dreams in the past 5 years, both of which defied the laws of phsyics, i.e. directions were messed up. I wanted to go down but equated to moving in a totally different direction and I noticed this. A straight line was really a corner, up wasn't up at all, physical objects made no sense to me as I didn't have the required understanding to figure out their geometry.

Still an interesting dream mind you.