Here is the full list of all 22 Lil Gator Game achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Break everything on the island.
Craft every item.
Swing with the Sticky Hand 5 times without touching the ground.
Make friends with everyone on the island.
Ragdoll into something as fast as you can.
Try to touch the sky.
YOU WILL NEVER KNOW THE TRUTH.
Learn the monkey's TRUE name.
Instruct the monkey on the power of creativity.
Learn the monkey's real name.
Learn the monkey's name.
Equip the full paint set.
Equip the full space set.
Acquire all bracelets, and gain enlightenment.
Equip the full ninja set.
Complete the story.
Completed Jill's Quest
Climb to the tippy top of the antenna.
Completed Avery's Quest
Completed Martin's Quest
Take a seat in the Junk Shop.
Undertake a new, bigger quest.