Here is the full list of all 18 Stilt Fella achievements.
Complete the tutorial.
Complete level 3.
Complete level 7.
Complete level 11.
Complete level 14.
Fall 30 times on the highway.
Reach Cyberworld.
Complete level 24.
Complete level 27.
Complete level 32.
Complete level 38.
Reach the finals.
You won the game!
Started Iron Fella mode.
Only the hard half left!
Seriously, how did you even do that?
Fall 25 times in one level.
Fall 50 times in one level.