InhumanElmo has released a RPG (style game) written in Lua for the PSP, heres what the coder says:

"This is a rpg style game that has a pacman style to it. It is still a work in progress but it is still cool. This is my first game and is sloppy but I will make it better. So far only 3 levels. Its written in lua and needs to have luaplayer to play it.

Coming soon:
Power Ups
Other asthetics"

Screenshots and download via comments