When I saw the title '3D snake' I wondered how ?? so I had to check this out!
The grid walls showing the positions is a neat idea. Only problem is we can't wee all the body if it's behind. For now we have to rely on memory. And adding transparency would probably just make things confusing...or?
Anyway nice try! :)
NB: plz remember that in EU we don't all use qwerty keyboard layouts. See: https://en.wikipedia.org/wiki/Keyboard_layout
I have qwertz so my Z key is where the Y key is for you: So it's like playing with A+Y for you.