*Points to Boot Stamping on a Knytt Face Forever*
For quite some time now, I've been designing BSoaKFF with this feature, the only difference is instead that BSoaKFF uses the horizontal 2D plane, instead of attempting pseudo-3D as you have. If what I said doesn't make since, just view these two screenshots found in the BSoaKFF topic's main post.
When you press down where the road crosses the road you are on, it switches the camera's perspective around you to face a different direction.
Now of course the isometric angle gives it a nice touch, but we have the same basic concept, just with a different 4th wall perspective.
I think this could look really interesting if you keep it up, and I hope to see more of this later on.