This is a short and sweet little "open world" puzzle game that's essentially a minimalist Witness. (I know I compare every game to The Witness but seriously, this game has a very similar type of puzzles.) Its got only a few mechanics but it hones and combines them to perfection, and while it is frustrating to figure out where the last puzzle you haven't solved is located none of the puzzles were frustrating or unfair, and many of them were very clever. Definitely give this a go if you like puzzle games.