5/5! The idea is simple but leads to very cleaver puzzles, the level design is amazing, each level focusing on an idea and implication of the rules and exploring it while also making sure you actually understood it by making you do it twice in two scenarios (I might be really wrong here but that's how I see it). It is amazing. Probably the best game I have seen in the jam.
Music is also really good though the sfx may be a bit too loud.