Here is the full list of all 24 Winkeltje: The Little Shop achievements.
Sell exactly 1 iron in a day
Buy 200 tiles
Make it to Shop Level 40
Level up the Planter to the highest level
Level up all Crafting Stations to the highest level
Level up the Forge to the highest level
Buy 100 tiles
Level up the Alchemy Station to the highest level
Level up the Stove to the highest level
Have 3 employees at level 10
Make it to Shop Level 30
Pay off your debt on Easy
Pay off your debt on Normal
Pay off your debt on Hard
Pay off your debt on Very Hard
Have 10000 silver
Get your shop to Appeal Level 30
Level up the Tailoring Station to the highest level
Craft a perfect quality item
Hire your first employee
Buy 1000 items from traders
Have 1000 silver
Craft 10 items in a day
Craft 10 items in a night