A clone of super mario bros for the PSP using the Phoenix Game Engine, written in Lua, it's open-source. It's under the gnu license v3. The project I'm creating has the codename 'Project Alpha' and the engine itself is called 'The Mario Engine v1'. As you can see currently on version 1, but is making steady progress everyday. To see videos of the project visiting my youtube channel: http://www.youtube.com/user/danielR369
It's a hombrew & requires a hacked PSP to play the game. Though a official public release is nearing.