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