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