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