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