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