Here is the full list of all 24 Superflight achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Crash 300 times.
Explore 100 maps.
Explore 50 maps.
Explore 25 maps.
Inverting the steering axis? Seriously, that's just wrong.
Gain 20.000 points in a single run.
Gain 40.000 points in a single run.
Crash 150 times.
Gain all three praises in a single run.
Gain the "Godlike!" praise.
Loose 10.000 points in a crash.
Reach the end of a map.
Crash 50 times.
Enter the zen mode.
Enter a seed and create a map.
Gain the "Awesome!" praise.
Complete your first run in Superflight.
Travel through a portal.
Complete a 1.000 points combo.
Complete a 5.000 points combo.
Complete a 10.000 points combo.
Gain 5.000 points in a single run.
Gain 10.000 points in a single run.
Gain the "So Close!" praise.