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.
Pressed the cable car button at least 5 times continuously.
Tried flying down the mountain.
Solved the riddle.
The hen ate the bag of grains.
Helped the skeleton get down to the bottom of the mountain.
The fox ate the hen.