hi,
I've been playing this game called Space Invaders OpenGL.
i'm pretty sure this game is open source and should be fairly easy to turn into a portable app(considering that it only has 2 EXEs, the game and the uninstall). all that needs to be done is to make the folders and change were it gets its music.
to re-explain if you put MP3s into the same folder as the EXE you can play them in the game.
here is the url to download it:
http://spaceinvadersgl.sourceforge.net/#overview
i'd imagine this game would go in the arcade games catergory.
i have no programing skills so i don't know how to this so please.
Thanks