Here is the full list of all 21 Cornucopia Demo achievements.
Pass out from Exhaustion
Earn 10,000 Gold
Try Every Scratch Card
Give your first Gift
Bomb an NPC
Get Stuck in the Waterwheel
Catch your first Fish
Harvest your first Fruit Tree
Discover the Old Mines
Harvest your first Berry Bush
Brush an Animal
Harvest your first Vegetable
Refine 10 Times
Plant your first Seed
Feed Munger for the First Time
Decorate your Home for the First Time
Open your first Letter
Steam Train was Spotted
Defeat the Spider Boss
Catch 10 Fish
Catch your first Large Fish