Here is the full list of all 10 Spellbound Spire achievements.
Seal the Corruption
Make an object float in zero gravity
Find the secret treasure room
Let Charles the snail fall down a long distance
Travel a total of 100 meters
Release the corruption core from its container
Have Charles the snail witness the game's finale
Break a total of 50 pots
Break (almost) nothing during a playthrough
Beat the game within 15 minutes