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