I have made a game with LUA called Button Mashing Revolution.
It's a clone of DDR. It has 6 songs, 4 levels of difficulty, and 2 backgrounds.
It's by me and Chris(PurePwnage) from TeamEvolution (http://rscx.com/dev/).
I coded it and made images, and Chris made images.
I have been working hard on this for a week, and I think it's very good.
Here's a screenshot:
Please read the file 'readme.txt' for futher information.
Also, I would like to thank aRanDomPenGuiN from http://forums.qj.net/psp-homebrew-hacks-discussion/18457-my-homebrew-game-idea.html#post179656 for the idea.
And thanks to Shine for the Starfield background and Nils for the 3D Cube.
v1.0 had a 'grading' bug that was cause because at the last minute, I found that sometimes the grading would do 0/0 and would crash. So, I added a fix to it (in v.1.0). HOWEVER, it also cause the % to usually be around 2600 because the '*100' was in the wrong place, so the grade would always be 'E'. I have found the problem and is fixed. Also, the random keys going down to 1 then back up to 11 is fixed.
I'm thinking of dropping this, the DJMAX Portable thing is so much better, this game just looks...horrible. If you want, I can add some D-pad suport (not 8 buttons, just triangle is up, circle is right, ect.) so its easier to hit the buttons.