It is interesting. The best way to solve it is to forget about dimensions and just learn the rules of what key does what in terms of piece movement.
In the 3D version I noticed it worked with WASD(QE). The arrow keys still mapped to WASD.
This version separates WASD from the arrow keys, they now control completely different movement dimensions.
I had to read the instructions a few times before it clicked that I had two use WASD and the arrows for two different tasks.
It is interesting. The best way to solve it is to forget about dimensions and just learn the rules of what key does what in terms of piece movement.