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.
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.
Swing with the Sticky Hand 5 times without touching the ground.
Equip the full space set.
Break everything on the island.
Climb to the tippy top of the antenna.
Craft every item.
Make friends with everyone on the island.
Acquire all bracelets, and gain enlightenment.
Ragdoll into something as fast as you can.
Take a seat in the Junk Shop.
Complete the story.
Completed Avery's Quest
Equip the full paint set.
Completed Jill's Quest
Equip the full ninja set.
Completed Martin's Quest
Undertake a new, bigger quest.