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