Here is the full list of all 13 Prompt achievements.
Died 512 times on a single level.
Best the developer in all timed challenges. Congrats!
Some things are best left undiscovered...
You have way too much time on your hands.
Upload a level to Steam Workshop.
Use the editor while green tint is on.
Completed the full run challenge. Wow!
Tutorial completed.
Collected every key.
Hard levels completed.
Hardcore levels completed.
Beat every level in the game.
Jump for the first time.