Although the performance is probably horrendous, you should take a look into CINT. It's interpreted C++. I've been using it to skip compiling during testing. Very few limitations as far as I can see.
The only thing that is worrying is one day someone is going to develop a Byond clone in a highly-portable general purpose language such as C or D using sdl or opengl for graphics. Then Byond will disappear from the face of the Earth :(
Considering how terrible games are on the phone, I would wager on BYOND staying while spoiled little brats who love to do everything on their phone (I mean, make their phone bills HUGE), would probably use the phone alternative.
The only thing that is worrying is one day someone is going to develop a Byond clone in a highly-portable general purpose language such as C or D using sdl or opengl for graphics. Then Byond will disappear from the face of the Earth :(