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