It would be insane to try and code like that.
You code is very nice looking, it's shame it doesn't run. You have enough room on the first edge of the cube to stick in something like s/\s+//g;eval that would transform the rest of the code into something that actually compiles.
Naturally it's not that easy, because you have to define $_ (which will be after, since it's the rest of the cube). I am sure you can find a way to keep your code cube-shaped and make it run.