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.
Crash 150 times.
Explore 50 maps.
Inverting the steering axis? Seriously, that's just wrong.
Gain all three praises in a single run.
Loose 10.000 points in a crash.
Gain the "Godlike!" praise.
Gain 40.000 points in a single run.
Explore 25 maps.
Gain 20.000 points in a single run.
Crash 50 times.
Enter a seed and create a map.
Complete a 10.000 points combo.
Gain 10.000 points in a single run.
Complete a 5.000 points combo.
Reach the end of a map.
Enter the zen mode.
Gain 5.000 points in a single run.
Travel through a portal.
Complete a 1.000 points combo.
Gain the "So Close!" praise.
Gain the "Awesome!" praise.
Complete your first run in Superflight.