I've unlocked the whole first section and half the second section in the FREE version! Please spend a minute of your time to check it out.
Walkabout Lite for iPhone, iPod touch, and iPad on the iTunes App Store
If you're on your iphone the link above will take you straight to the app store page to download the FREE version
Its also currently featured on Android Market and has become really popular! Help an INDIE dev and check it out
If anyone wants a promo code, I have a few left please PM me!