Have you seen the Lua GUI terminal found at
http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/5.2/Lua.zip this is quite an easy Lua distribution to use which has majority of the libraries in contrast to the Lua compiled command line app that needs to be compiled with the libraries etc to make them work.
Just sharing as I thought this would be quite useful to test out small snippets (drag drop) for pure Lua solutions.