Here is the full list of all 21 TOHU achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Collect all creatures
Complete the game
Enter credits page
Talk with all characters
Click on the claw
Click on amanitas two times
Click on the rat two times
Try all moles combinations
Try to apply the glove on a hand
Fall down
Make the trader to run 3 times
Let the Samurai to spot you 5 times
Give the wrong potion to the prisoner
Enter the correct code
Go 5 times into the fog
Click on any of 9 birds
Drop the pirate into the water
Move from the past to the future
Listen to all the musicians tracks
Let them eat
Create the radio gun