Short and sweet! Sometimes a simple game mechanic works the best, I actually thought that in the end il have to go through every lock and unlock it, since it changed how the icon looked on the map, but this way was much better, it saved a lot of backtracking, so thanks for doing it that way.
Good job!
(p.s, I would appreciate it if you could try out my game aswell! It is really short so it wouldn't take long)