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