Very cool game, I wish I had taken the time to polish level design like you ! Well, I guess you may wish you had some time for the art... You did a good job turning the theme into gameplay, where many entries would just do their thing and make the environmental visuals strange.
Anyway, I tend to enjoy the actual puzzles a bit more than the guesswork to figure out the rules, and you delivered that too, with many levels requiring a bit of thought even once the rule is figured out, and of course the last 8 levels, which introduce challenge in the right way : by mixing rules, rather than leaning towards the "let's make the level bigger so there's more steps" approach, which is often unsatisfying as a player.
Nitpicking : 7.2 was frustrating : it was its own rule discovery, and perhaps the rule's a bit too out of the box to not introduce it in a minimal setting ? I encountered a bug in 13.2 where the laser would often (but not reliably) kill me through walls.