Here is the full list of all 13 GrappleWell achievements.
Beat the game
beat the trials zone
Beat the forest zone
Beat the labs zone
Beat the lava zone
Beat the ice zone
Find your first penny
Complete the earth zone
Beat the tutorial zone
Beat the game in under 30 minutes
Beat the game in under 20 minutes
Beat the game in under 15 minutes
Collect all 22 pennies