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