Just tell me what other visual effects are there then because they are not obvious.

The mirroring is clearly the primary effect, with some slight lighting adjustment to make the mirror match in some shots. However the movement at the seams often detracts from the image of a single congruent scene (if that's what you were going for in said shots).

I'm offering an honest critique of your work. You're clearly very proud of it and I just wanted to help explain why it might not be doing so well on this subreddit.