Good Job...hope u'll add more and more songs. And as a programmer i see few bugs. hope u'll improve on next update.
- need a now playing button on index page( every time you wanna stop a playng music you have to go to next page to press 'Done'
- After pressing 'Done' looks like program crashes suddenly. instead it should go back to home page.
- on the info page, the application screen size is large so that the buttons to go back is hidden. you have to close the entire app to launch again.
- the 'press here to start' button on first page is unnecessary.
- on apps like this you should have option to add to Favorites. Looks like you have your favorite but no option that user can add.
- when 'play all ' button is pressed and ' Next' is pressed the app crashes. looks like some bugs on algorithm.

And many more.. take this as suggestions.
I am using 3gs. may be different on other devices.