I am editing this review to make my point clearer.
I will start again as in my previous one stating that FEZ is actually a very easy game; and I think I have ground to say that, since I have obtained the 64 cubes without any guide or spoiler (other than being informed about the red cubes so I wouldn't waste my time with them).
If you watched any trailer and/or played the game, you know about the mind-blowing mechanic of "rotating & projecting" (R&P) which is very, very ingenious and has potential for a lot of fun. Potential, I said.
In FEZ you basically have to collect Yellow Cubes (32 max), Blue Cubes (anti-cubes, 32 max) to unlock doors. You unlock the ending after collecting 32 regardless of colour. There are also 3 "easter egg" Red Cubes which do not count towards anything.
To obtain most Yellow Cubes (and thus complete the game) you need nothing but this R&P mechanic, which is essential to reach some places. After few minutes you get the grip of it and it gets old. It gets easy, too easy; it is just interesting, not really challenging.
The hype is about the *other cubes*.
Several Blue Cubes are trivial as well, some of them are fun... but... *none of them are about the R&P mechanic*. To unlock these cubes here you usually need to press some buttons in a specific order, usually in a specific room. The "challenge" resides in finding the said sequence, but finding them does not depend on the R&P mechanic either, and at this point you'd be just playing a regular platform game where you use R&P merely to reach different rooms.
Whereas some combinations are readily available in their own room, some others require hints hunting throughout the FEZ world - and that's the only hard part of the game. Searching for patterns and glyphs throughout the world - which is very confusing to navigate - in a sea of things which could be a hint for a puzzle or just decoration... no problems if you have a photographic memory or a memory just good enough to remember "where did I see these symbols before?" but otherwise you would need to be paranoid like myself and take a screenshot of 50% of the rooms in the game just to make sure you will have those symbols available in case you need them sooner or later. Some of them can be bruteforced as well, which can be far more enjoyable than travelling in FEZ's map.
While you might enjoy hint-hunting kind of games, even that is not clever: the hints are straightforward and require very little brainwork after you actually find them (I enjoyed cracking the counting cube though
). You just go "there and use it" - no clever use of the R&P mechanic either. That is definitely not what I expected from this game here.
Lastly, Red Cubes. Not even funny. By analogy, I would say that the red cubes are equivalent to the following riddle:
"_____ ____ have I, two below and ___ in a ____; Then ____ ____ one kills, ____ . What is my name?"
This is not a clever riddle, its just incomplete. In the same way, there is nothing clever about the red cubes. It is okay though since they were supposed to be "easter eggs", they do not progress the game and the devs were not insane enough to put them as achievements.
All in all, the game is interesting, but it doesn't deserve the hype. The awesome mechanic was not properly exploited by the devs.