Great Game

Question

How do you get to see the code, besides the HTML only?

Answer 1

Do you want to see source code of the C++ program having only binary files?
Don't think that it is real, if the program is not open source. It is impossible at home. Maybe there is very limited access for such kind of program. Maybe secret services has some kind of Disassembler.
In my opinion it is very complicated even to imagine its realization or logic.
C++ has preprocessor that changes source code. Then compiler translates processed code into machine language. Also there are optimization keys, that again changes logic and structure. It can change data types, replace functions with inline code, shuffle your code for cache optimization, delete some parts if they are not needed.
Summing up, it is impossible for now