Fez is also notable for its determination to let the player take their time and not worry about failure.
(Plus Braid is so influential you should study its failings and triumphs for context on current design trends.)
Projection: First Light lead developer Michael Chu notes that Braid is a good study in how you can incorporate a unique mechanic into an established genre.
Both of Playdead’s atmosphere-laden puzzle-platformers make for great studies in design, audio, and realizing a creative vision.