a) Yup, I have same experience here on iPad 1. b) I disagree with this, but my kid is 3 years old. I thought the music selection was playful and best of all, not annoying when played ad infinitum. c) I bought the paid version thinking that it would come with all the extras. I don't like in-app purchases in paid apps, and I think this should have been an option in the free version only.

With that in mind, I would also suggest that you provide a way to earn monster bucks for free, through offerwalls. Disclaimer and shameless self-promotion: I work for Tapjoy, that does this: https://www.tapjoy.com