In the same spirit as : How is the language code in Fez intended to be solved?
I was able to crack the language code using tradition substitution cipher breaking techniques.
But I ended up cheating on the number/tetris symbols by looking on the Internet.
The number code is logical enough now I know it — but I can't see how I would have arrived at it without help.
With regard to tetris shapes:
What would cause you to go down the path of associating Tetris shapes with controller inputs?
Best Answer
Tetromino/Tetris block cipher
Controller inputs are only associated with tetrominos once.
Where?
What's inside?
The classroom in the 8-cube Blade Runner city then shows how to interpret the pillars with tetromino inscriptions. Here's one wall, but relate it to the others:
Numbers cipher
Like the alphabet, there isn't one proper way to do this, but you might be interested in the 16-cube temple's classroom. Instead of trekking back, this is what it looks like:
Hint: