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