Lua programing, just a quicky

Well now that ive finely got windows working on my psp just the way I wanted,
its time to move to my next goal, Im gonna throw togeather a quciky lua game/prog/somthing, just to get it out there, and it's gonna be exclusive to Dcemu, so you wont find it anywhere else. In case some of you are wondering, No I havnt forgotten about the game im working on,Its still comeing :p

But if a person where to just throw togeather a quicky app for the psp,
What are some good ideas?
And please people nothing monolythic here, im just createing somthing small.
Any Ideas ?

What about a puzzle game with different types of puzzles, similar to jewel matching, balancing pices (kind of tertis game but you have to keep some evenness with 2 sides of the screen), etc.? Or maybe a Tropical coumns game with fruits instead of jewels...

A baku baku animal clone sort of thing? puyo puyo clone would be good!