What is the final achievement on learn to fly

haha u guys its easy! all you have to do is keep beating your origanal score for example 1 foot flown then 2 feet then 3 go like that on that level till you get to 6000 feets

noooooooooooooooo when u have done all the acievements except the mystery one you click the button "end game" then you will win!!!