We should have an update in the next few days that will fix the sound playing on when it's paused. And one or 2 other things.
I am not sure what you mean by multitasking compatible, it was written for iOS4 and will very happily sit in the background when you swap apps and you can also continue playing while on a call (if you really want to). You just need to switch to the app and click 'Continue'.
That said, it's our first effort and we are at a steep learning curve and we want feedback to drive our development so we can improve it the way people want it. We have some great ideas for the next version (different backgrounds, animals to interact with, Game Centre integration, etc.) but we first have to make a bit of money back so we can invest more in the game. Chicken and egg.
