Fez is as much a piece of gaming art as it is a charming puzzle-platformer. It's up to each individual to reflect upon the former aspect, whereas on the latter I have this to say: If you are not keen on exploration, you can easily "complete" the game while having seen only half of what it has to offer. The real challenge lies in working your way beyond the 100% completion mark and solving puzzles that get increasingly difficult. In fact, some of the later mysteries are so cryptical, most people simply won't have the patience for it. But if you are looking for genuinely hard puzzles with very little help from the game itself, Fez might be just the thing.