Here is the full list of all 17 Trading Time: A Croak Tale - there are Prologue achievements.
Speak to The Shaman for the first time.
Retrieve your plant and leave the island.
Hit The Shaman with a thrown item.
Find and return The Shaman’s missing arm.
Jump [100] times.
Stay airborne for over 4 seconds
Throw 50 items
Walk 10km
Jump on all the lily pads in the large pond in order
Take a starfish to the crater
Get stung by thorns
Make your first camp fire
Go through the secret entrance whilst the door is locked
Plant all flowers
Find a way on top of a house
Chase away 200 fireflies
Hit the shaman with a pillow