ive got lumines and tried to play my own song while playing the game and i cant.
i cant listen to my own song that ive tranfered to the memory card with lumines. Everytime i start the music player and then lumines, the music player stop by itself even if ive got no lumines music volume.
The designers for that game probably chose to disable that option because they thought you couldn't possibly want to listen to other music while playing this game, because music and gameplay are so closely intertwined. While there is something to say for this, they overlooked Time Trial mode, which has horrible music, happens to be my favorite mode, and would have been perfect to play while listening to a podcast or other music in the background.
Even then, it's probably better to leave it up to the player. Sound Shapes does in fact allow it, which means that I can listen to a podcast while playing that game and still hear the music as well. The only other game I have that doesn't allow it, is Rayman Origins I think, which while I admit it has a great soundtrack, and I don't really miss it, even there I think it would have been better to have the choice.