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