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I found a secret !
Go in the achievement list, then click on the Achieving the Impossible one.
Read the whole description, and click the dot at the end of it.
You'll be directed to a special place...
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Tip for the hard badge: upgrade everything (day 16,17 the latest). On the ramp, use all the rocket fuel for getting as high up as you can. Then slowly, make decrease in altitude while rapidly gaining high. You can then grab a quick snack and watch the show. You'll need to regain control at around 5.5k distance because that is when the penguin get's dangerously low to the sea. The rest is history. + so everyone can see :)
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I still don't get it
how you fly longer the rocket let me fly a little far and the glider all it does make me fly high