There are 8 different themed regions. Locked regions can be unlocked by digging a certain number of rewards. The unlock requirements increase with each region to encourage exploration and reward digging!

Each region can be seen as an icon on the right side of the screen:

What if I finished all the regions?

Once all rewards have been dug up, a shovel counter appears at the top of the menu, granting rewards for every set number of shovels collected.