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.
Equip the full space set.
Craft every item.
Make friends with everyone on the island.
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.
Equip the full paint set.
Break everything on the island.
Complete the story.
Learn the monkey's name.
Completed Jill's Quest
Acquire all bracelets, and gain enlightenment.
Equip the full ninja set.
Completed Avery's Quest
Completed Martin's Quest
Take a seat in the Junk Shop.
Climb to the tippy top of the antenna.
Ragdoll into something as fast as you can.
Undertake a new, bigger quest.