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