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