On further testing, it copies internal to the sandboxed browser game, so while I can't copy my code out, it is then what is pasted if I go back and try to load a code. (Aka, I also have to then hand type the code back in in order to load a custom level)
It's cool that you made some levels. It's a pity, but I couldn't run it. About copy\pase function by default on Unity for WebGL does not work correctly. I didn't know about that when creating that game. Maybe when I have enough free time, I will fix it.
