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