language creation

Is it possible to write a programming language with an existing one?  I want to create a game creation program, and have it use it's own language for additional programming.  Something similar to Game Maker.

you can't actually _do_ anything with joy though because the higher level combinators (i.e. most of the useful ones) work on the entire stack thus destroying any state information.

also, Christy McJesus is an idiot.

that is all.