Sounds like everyone's got the same problem I'm having.
Own an 8gig iPod touch. The game worked for about 2 days, and now it just brings up the load screen for about 10 seconds, then back to the home screen. Doesn't matter if I'm already playing music or not, still does it. I've restored my touch twice and re-downloaded the game a couple of times. I won't give up until it works right, I think it's a great game and worth the effort to wait for a fix. Hopefully, there is a fix???
I just deleted and reinstalled the app and it looked for my information and then crashed immediately. My info was completely lost. and the game crashed numerous times while taking me through the beginning steps.
I LOVE this game! I was very sad when it kept crashing on start up. Then I found your site and found help to fix it! I loaded an itunes song listened to it for a few and then loaded the game and it started right up! ;D Thank you! Thank you! Thank you!