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.
Crash 150 times.
Enter the zen mode.
Inverting the steering axis? Seriously, that's just wrong.
Gain all three praises in a single run.
Complete a 10.000 points combo.
Gain the "Godlike!" praise.
Enter a seed and create a map.
Loose 10.000 points in a crash.
Explore 100 maps.
Gain 40.000 points in a single run.
Crash 50 times.
Complete a 5.000 points combo.
Gain the "So Close!" praise.
Explore 50 maps.
Gain 20.000 points in a single run.
Explore 25 maps.
Gain 10.000 points in a single run.
Gain 5.000 points in a single run.
Travel through a portal.
Complete a 1.000 points combo.
Gain the "Awesome!" praise.
Complete your first run in Superflight.
Reach the end of a map.