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