What an infuriatingly cool game! I ended up completing it (maybe not cause there was a cryptic message at the end) and darn it, it was so well designed. At first it was a bit difficult to understand the mechanics and the shifting of the floor, but in the end I did it. Unique idea and the first time I moved the wall I audibly gasped and then tried to understand how you did it haha. The simplicity of the controls is also a plus point, so minimal tutorials but such a polished experience. A minor nit pick: the character sometimes got stuck on the edges of the floor above a hole if I kept walking towards it.
Overall: 9/10!