Fun game!
Had some trouble grasping some of the concepts, but once I got the hang of it I had a good experience.
Found an exploit: If you have 7 potatoes and buy the Muddy Pile it does not take potatoes away. I had all the stage covered in the stuff :) but then I wanted to place some cows and the game wasn't letting me D: (don't know if that's part of the desing or not)
You two did a great job! :D