After completing all the levels on android, I was a bit upset to find that the Jungle Expedition was not a thing to be unlocked but a thing to install for PC only.

Except...

You can follow the PC installation instructions, then  put the folder in 

Android>data> space.jmoore.QuickTowerDefence>files>Adventures

And everything will be unlocked and ready to play on your android device. Yay!