Here is the full list of all 6 Fox! Hen! Bag! achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
The fox ate the hen.
The hen ate the bag of grains.
Solved the riddle.
Tried flying down the mountain.
Helped the skeleton get down to the bottom of the mountain.
Pressed the cable car button at least 5 times continuously.