I like this! It makes me think of an experiment box with a mirror on one side, where you put an arm inside and see its reflection. Something like this: https://www.physio-pedia.com/Mirror_Therapy
This is rather good! I am looking at potential crops from square or just cropped in as a landscape image. I am not saying it would be better or not, but worth playing with different crops, if you haven't already!
