Here is the full list of all 14 Flatworld achievements.
Why did you come back?
Finally you used the door to come in.
It contains all the nutrients your body needs.
You broke it and discovered a secret!
What's in the box?
Always useful when the way is blocked.
Don't lend your money to strangers.
Can normal people learn to do magic?
You have strayed from the right path.
Now you must go after the cards you unleashed.
You just followed the instructions.
Unfortunately you won't get your money back.
You can win races even with the wind against you.