Durante has released an Excellent looking game for the PSP, heres whats posted on his Site:
Crystalise is an action/puzzle game for the Sony PSP.
It uses a highly modified version of Shine & Nevin's LuaPlayer.
Most of the functionality is contained in about 2600 lines of Lua code, but I implemented some fairly game-specific performance-critical methods in C. I also rewrote most of LuaPlayer's graphics code to use OpenGL and added some (graphical and other) features.
All images and sound effects were also made by me, so you should be aware that this is programmer's art.