I've put three together. I used textures from 'Webtreats' for the background, which are freely available and licensed for commercial and non-commercial use, no attribution necessary. However, the resources they offer are great (especially BECAUSE ...
You need either a paid dev account or the free Dreamspark account to run the app on your phone.
I read about this app a few days ago, and I believe this is what you're looking for: