Here is the full list of all 18 Squidlit achievements.
Continue to wiggle on the final screen!
Complete the game without stress eating a muffin!
Beat the game in less than 12 minutes.
Beat the game in less than 11 minutes
Beat the game in less than 10 minutes 30 seconds
Beat the game in less than 10 minutes (Wow!!!)
Find Riverjack!
Wiggle at all the squidlits!
Beat the sharkerfly in less than 5 seconds
Make the music stop!
Don't start the game for a minute and a half!
Restart the Game!
Don't get inked during the credits!
Hug Skwit Skwot!
Feed all of your muffins to Skwit Skwot!
Continue to ink after beating the sharkerfly!
Don't let Grimwar summon anything!
Become a squidlit repellant connoisseur!