Very nice game! Interesting puzzles and game elements, especially liked the dual versions of the maps. Palette swapping is also nice, I just personally find most palettes to be quite difficult to look at, but that might be because I prefer darker colors in general. Really enjoyed the finishing touch as well, kudos!
However there are a few minor points: the laser key was quite confusing at first since I though it was the up arrow key, maybe consider making the image of the key wider to hint that it is in fact the shift key. I also didn’t find it very intuitive that the laser goes through walls, but it is made apparent with one of the puzzles so overall it works nicely. I did find a bug in the last puzzle though: if the piece that fills up the upper right corner of a square is immediately next to the target then the laser doesn’t seem to be reflected correctly, it needs to be at least one square apart for it to be picked up.
Hope you develop the game further and create a version with more puzzles and game elements!