This was fantastic! Having the aim line was really nice so it was easy to flip my attention quickly between the screens. The puzzles were good and I love how you ended it. Having the contrast adjust was great (as well as the other adjustments). I'm always wanting gamepad support.
The only very minor things where the final three part door timing was very difficult for me and the color swap tiles to better show their connection to the active layout. With the first one I forgot I could go back onto the first one. Again very minor, and I figured it out. That being said, even as is, if there was 10hrs of content for this, I'd definitely play it!